Add README file.

README.md

@@ -1,4 +1,22 @@
-XcodeBlockSyntaxSnippets
-========================
+# XcodeBlockSyntaxSnippets
 
-Xcode snippets for block syntax. http://fuckingblocksyntax.com/
+Xcode snippets for [block syntax](http://fuckingblocksyntax.com/). 
+
+## Installation
+
+Move `xxx.codesnippet` files in `CodeSnippets` to
+
+```
+~/Library/Developer/Xcode/UserData/CodeSnippets
+```
+
+## Usage
+
+I defined completion shortcuts start `blockas...`.  
+Just type `blockas...`, then you can see what you want to do in code completion list.
+
+## Note
+
+* `As a local variable` is defined by default as `inlineBlock` completion shortcut, but I redefined.
+* `As a typedef` is defined by default as `typedefBlock` completion shortcut, but I redefined.
+* I don't define `As an argument to a method call`, because Xcode's Auto Completion helps us.