Add a ruby script enables yard to process .m files as C code

git-svn-id: https://svn.code.sf.net/p/rubycocoa/svn/trunk/src@2480 f4f36d40-9719-0410-9868-dde021a23eda
Fix build error from r2479

git-svn-id: https://svn.code.sf.net/p/rubycocoa/svn/trunk/src@2481 f4f36d40-9719-0410-9868-dde021a23eda
Generate Ruby documents under doc/ruby/ with yardoc

git-svn-id: https://svn.code.sf.net/p/rubycocoa/svn/trunk/src@2482 f4f36d40-9719-0410-9868-dde021a23eda
Add Ruby API documents for yardoc

git-svn-id: https://svn.code.sf.net/p/rubycocoa/svn/trunk/src@2483 f4f36d40-9719-0410-9868-dde021a23eda
Deprecated string functions using NKF

deprecated functions:
- NSString.guess_nsencoding
- NSString.guess_encoding
- NSString.stringWithRubyString
- NSMutableString.stringWithRubyString
- String.nsencoding

git-svn-id: https://svn.code.sf.net/p/rubycocoa/svn/trunk/src@2484 f4f36d40-9719-0410-9868-dde021a23eda
Remove tests for deprecated methods

git-svn-id: https://svn.code.sf.net/p/rubycocoa/svn/trunk/src@2485 f4f36d40-9719-0410-9868-dde021a23eda