README.rdoc -> README.md
Rewrite summary and description
Bump 1.6.0
Merge branch 'develop'

Conflicts:
	README.md
Add FileTest.readable? (#65)

Warning if file is not readable.
https://github.com/ongaeshi/milkode/issues/65
Bump 1.6.1
Merge branch 'develop'
Add  DummyRecord
Comment out 'File.read'
Add "get '/gmilk"
Return dummy data
Implement DummyRecord.from_url
Add gmilk -F(--fast-gmilk) option
Change the setting of TravisCI [groonga-dev,02268]
Create URL of DummyRecord.from_url from directory and query
Implement Command#search_for_gmilk
Test  Groonga#select in Command#search_for_gmilk
Use package parameter
Support dir parameter
Support "gomilk -a" option