Improve error message
#61 Without displaying stacktrace when pressed Ctrl+C on gmilk

https://github.com/ongaeshi/milkode/issues/61 (Thanks msmhrt)
README.rdoc -> README.md
thin < 2.0.0 in Gemfile
Util::func -> Util.func
#58 Use whichr in Util.exist_command?

https://github.com/ongaeshi/milkode/issues/58 (thanks kazuna)
Use "rescue Error::EACCESS" instead of FileTest.readable? for Windows (#57)

https://github.com/ongaeshi/milkode/issues/57 (thanks kazuna)
Support ENV['GMILK_OPTIONS']

export GMILK_OPTIONS="-a -o sjis" -> gmilk -a -o sjis
git@ -> git://  (For TravisCI)
Add TravisCI Button
Rewrite summary and description
Bump 1.6.0
Merge branch 'develop'

Conflicts:
	README.md