Add readme and add new alias cfpc: paste+compile+copy

plugins/coffee/README

+## Coffeescript Plugin
+
+This plugin provides aliases for quickly compiling and previewing your
+cofeescript code.
+
+When writing Coffeescript it's very common to want to preview the output of a
+certain snippet of code, either because you want to test the output or because
+you'd like to execute it in a browser console which doesn't accept Coffeescript.
+
+Preview the compiled result of your coffeescript with `cf "code"` as per the
+following:
+
+```zsh
+$ cf 'if a then be else c'
+if (a) {
+  b;
+} else {
+  c;
+}
+```
+
+Also provides the following aliases:
+
+* **cfc:** Copies the compiled JS to your clipboard. Very useful when you want
+           to run the code in a JS console.
+
+* **cfp:** Compiles from your currently copied clipboard. Useful when you want 
+           to compile large/multi-line snippets
+
+* **cfpc:** Paste coffeescript from clipboard, compile to JS, then copy the
+            the result back to clipboard.

plugins/coffee/coffee.plugin.zsh

@@ -11,3 +11,6 @@ cfc () {
 
 # compile from pasteboard & print
 alias cfp='coffeeMe "$(pbpaste)"'
+
+# compile from pasteboard and copy to clipboard
+alias cfpc='cfp | pbcopy'