docs: update release announcement

ANNOUNCE

@@ -1,11 +1,10 @@
-I'm pleased to announce hledger and hledger-web 0.21!
+I have released hledger and hledger-web 0.22.
 
 hledger is a command-line tool and haskell library for tracking
 financial transactions, which are stored in a human-readable plain
 text format. In addition to reporting, it can also help you record new
 transactions, or convert CSV data from your bank. Add-on packages
 include hledger-web (providing a web interface), hledger-irr and hledger-interest.
-
 hledger is inspired by and compatible with John Wiegley's Ledger. For
 more, see http://hledger.org .
 
@@ -16,33 +15,63 @@ cabal update; cabal install hledger [hledger-web]
 For more installation help, see http://hledger.org/MANUAL.html#installing .
 Or, sponsor a ready-to-run binary for your platform: http://hledger.org/DOWNLOAD.html .
 
-Release notes (http://hledger.org/NEWS.html#hledger-0.21):
+Release notes (http://hledger.org/NEWS.html#hledger-0.22):
 
-**Bugs fixed:**
+**New:**
 
-  - parsing: don't fail when a csv amount has trailing whitespace (fixes #113)
-  - web: don't show prices in the accounts sidebar (fixes #114)
-  - web: show one line per commodity in charts. Needs more polish, but fixes #109.
-  - web: bump yesod-platform dependency to avoid a cabal install failure
+- balance: with a reporting interval (monthly, yearly etc.), the
+  [balance command](MANUAL.html#balance) will now show a multi-column report, showing either
+  the per-period changes in balance (by default),
+  the period ending balances starting from zero (`--cumulative`),
+  or the actual period ending balances (`--historical`).
+  A more detailed specification of the balance command's behaviour
+  has been added to [Hledger.Cli.Balance](http://hackage.haskell.org/package/hledger/docs/Hledger-Cli-Balance.html).
 
-**Journal reading:**
+- csv: rules files can now include other rules files, useful for factoring out common rules
 
-  - balance assertions are now checked after reading a journal
+- queries: `sym:REGEXP` matches commodity symbols
 
-**web command:**
+- register: `--average/-A` shows a running average, like ledger
 
-  - web: support/require yesod 1.2
-  - web: show zero-balance accounts in the sidebar (fixes #106)
-  - web: use nicer select2 autocomplete widgets in the add form
+- in period expressions, `-` (hyphen) can be used as a more compact
+  synonym for `from` and `to`.  Eg: `-p 2012/12/1-2013/2/1` or `date:aug-`.
 
-**Documentation and infrastructure:**
+- the add-on script examples in extra/ have been updated; get the
+  hledger source and add .../hledger/extra/ to your PATH to make them
+  available.  They include:
 
-  - add basic cabal test suites for hledger-lib and hledger
+        hledger-accountnames.hs - print account names
+        hledger-balance-csv.hs  - print a balance report as CSV
+        hledger-equity.hs       - print an entry matching all account balances (like ledger)
+        hledger-print-unique.hs - print only journal entries unique descriptions
+        hledger-register-csv.hs - print a register report as CSV
 
+**Improved:**
 
-Release contributors:
+- balancesheet: now shows just assets and liabilities, not equity
 
-- Xinruo Sun enhanced the hledger-web add form
-- Clint Adams added cabal test suites
-- Jeff Richards did hledger-web cleanup
-- Peter Simons provided the build bot
+- print: comment positions (same line or next line) are now preserved
+
+- queries: `amt` now uses the = operator by default, eg `amt:50` is
+  equivalent to `amt:=50`
+
+- command line processing has been overhauled and made more
+  consistent, and now has tests and debug output.  More flags now work
+  both before and after COMMAND: `-f`, `--rule-file`, `--alias`,
+  `--help`, `--debug`, `--version`.  Command line help, command
+  aliases, API docs and code have been improved.
+
+- `--debug` now takes an optional numeric argument to set the debug level
+  higher than 1, for more verbose debug output in a few cases.
+
+**Fixed:**
+
+- csv: CSV data containing non-ascii characters is now supported
+
+- build with latest versions of dependencies (text, warp, http-conduit etc.)
+
+**Release contributors:**
+
+Marko Kocić, Max Bolingbroke, and a big welcome to first-time committer John Wiegley! :)
+
+There's a rumour that a 1.0 release could be next, depending on how this one fares. All feedback welcome.