Fix ruby `super_call` snippet

There was no tab in the beginning of the line and snippet wasn't
working.
Merge pull request #263 from bsutic/fix-ruby-super-call

Fix ruby `super_call` snippet
snip `nc` auto detect `Abstract` and `Interface`
Merge pull request #264 from chrisyue/master

snip `nc` auto detect `Abstract` and `Interface`
`nc` support trait
Merge pull request #265 from chrisyue/master

`nc` support trait