Add list highlighting nice features to readme (#664)

This was suggested by @zaiste, to make it clearer how Just differs from
Make, and what features it has.

.github/workflows/build.yaml

@@ -19,13 +19,13 @@ jobs:
         os:
         - macos-latest
         - ubuntu-latest
-        - windows-latest
+        - windows-2016
         include:
         - os: ubuntu-latest
           target: x86_64-unknown-linux-musl
         - os: macos-latest
           target: x86_64-apple-darwin
-        - os: windows-latest
+        - os: windows-2016
           target: x86_64-pc-windows-msvc
 
     runs-on: ${{matrix.os}}
@@ -41,19 +41,19 @@ jobs:
       uses: actions/cache@v1
       with:
         path: ~/.cargo/registry
-        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+        key: 0-${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
 
     - name: Cache cargo index
       uses: actions/cache@v1
       with:
         path: ~/.cargo/git
-        key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
+        key: 0-${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
 
     - name: Cache cargo build
       uses: actions/cache@v1
       with:
         path: target
-        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+        key: 0-${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
 
     - name: Install Main Toolchain
       uses: actions-rs/toolchain@v1
@@ -80,7 +80,7 @@ jobs:
       run: cargo clippy --all
 
     - name: Lint
-      if: matrix.os != 'windows-latest'
+      if: matrix.os != 'windows-2016'
       run: cargo run lint
 
     - name: Install Rustfmt Toolchain
@@ -95,7 +95,7 @@ jobs:
       run: cargo +nightly fmt --all -- --check
 
     - name: Completion Scripts
-      if: matrix.os != 'windows-latest'
+      if: matrix.os != 'windows-2016'
       run: |
         ./bin/generate-completions
         git diff --no-ext-diff --quiet --exit-code

README.adoc

@@ -12,7 +12,7 @@ image:https://img.shields.io/badge/Say%20Thanks-!-1EAEDB.svg[say thanks,link=htt
 
 (非官方中文文档,link:https://github.com/chinanf-boy/just-zh[这里],快看过来!)
 
-Commands are stored in a file called `justfile` with syntax inspired by `make`:
+Commands, called recipes, are stored in a file called `justfile` with syntax inspired by `make`:
 
 ```make
 build:
@@ -27,7 +27,7 @@ test TEST: build
     ./test --test {{TEST}}
 ```
 
-You can then run them with `just COMMAND`:
+You can then run them with `just RECIPE`:
 
 ```sh
 $ just test-all
@@ -36,9 +36,40 @@ cc *.c -o main
 Yay, all your tests passed!
 ```
 
-`just` produces detailed error messages and avoids `make`’s idiosyncrasies, so debugging a justfile is easier and less surprising than debugging a makefile.
+Just has a ton of useful features, and many improvements over Make:
 
-If you need help with `just` please feel free to open an issue or let me know on link:https://gitter.im/just-because/Lobby[gitter]. Feature requests and bug reports are always welcome!
+- Just is a command runner, not a build system, so it avoids much of
+  link:https://github.com/casey/just#what-are-the-idiosyncrasies-of-make-that-just-avoids[Make's
+  complexity and idiosyncrasies]. No need for `.PHONY` recipes!
+
+- Errors are specific and informative, and syntax errors are reported along with their source context.
+
+- Recipes can accept
+  link:https://github.com/casey/just#recipe-parameters[command line arguments].
+
+- Wherever possible, errors are resolved statically. Unknown recipes and
+  circular dependencies are reported before anything runs.
+
+- Just link:https://github.com/casey/just#dotenv-integration[loads `.env`
+  files], making it easy to populate environment variables.
+
+- Recipes can be
+  link:https://github.com/casey/just#listing-available-recipes[listed from the
+  command line].
+
+- Command line completion scripts are
+  link:https://github.com/casey/just#shell-completion-scripts[available for
+  most popular shells].
+
+- Recipes can be written in
+  link:https://github.com/casey/just#writing-recipes-in-other-languages[arbitrary
+  languages], like Python or NodeJS.
+
+- `just` can be invoked from any subdirectory, not just the directory that contains the `Justfile`.
+
+- And link:https://github.com/casey/just#manual[much more]!
+
+If you need help with `just` please feel free to open an issue or ping me on link:https://discord.gg/ezYScXR[discord]. Feature requests and bug reports are always welcome!
 
 [discrete]
 == Manual

bin/package

@@ -20,7 +20,7 @@ case $os in
     cargo rustc --bin $bin --target $target --release
     executable=target/$target/release/$bin
     ;;
-  windows-latest)
+  windows-2016)
     cargo rustc --bin $bin --target $target --release -- -C target-feature="+crt-static"
     executable=target/$target/release/$bin.exe
     ;;
@@ -46,7 +46,7 @@ case $os in
     tar czf $archive *
     echo "::set-output name=archive::$archive"
     ;;
-  windows-latest)
+  windows-2016)
     archive=$dist/$bin-$version-$target.zip
     7z a $archive *
     echo "::set-output name=archive::`pwd -W`/$bin-$version-$target.zip"