Add embedding instructions

Improves #31 with both documentation and a simpler API.

README.md

@@ -72,6 +72,27 @@ Issues
 Issues are tracked [here](https://github.com/walles/moar/issues), or
 you can send questions to <johan.walles@gmail.com>.
 
+Embedding
+---------
+
+Here's how to embed `moar` in your app:
+
+```go
+package main
+
+import (
+	"github.com/walles/moar/m"
+)
+
+func main() {
+	err := m.PageString("Months", "March, April\nMay")
+	if err != nil {
+		// Handle pager problems
+		panic(err)
+	}
+}
+```
+
 Developing
 ----------
 

m/util.go

@@ -0,0 +1,22 @@
+package m
+
+import "github.com/gdamore/tcell/v2"
+
+// PageString displays a multi-line text in a pager.
+//
+// name - Will be displayed in the bottom left corner of the pager window
+//
+// text - This is the (potentially long) multi line text that will be displayed
+func PageString(name string, text string) error {
+	reader := NewReaderFromText(name, text)
+
+	screen, e := tcell.NewScreen()
+	if e != nil {
+		// Screen setup failed
+		return e
+	}
+	defer screen.Fini()
+
+	NewPager(reader).StartPaging(screen)
+	return nil
+}