Improve ruby `desc` snippet

Instead of dummy text, first argument for `describe` becomes a class
name derived from a file name. Example:
file:              some_class_spec.rb
describe argument: SomeClass
Merge pull request #279 from bsutic/improve-ruby-desc

Improve ruby `desc` snippet
Improve processing snippets
Merge pull request #280 from crazymaster/master

Improve processing snippets
Fix a wrong snippet in processing
Merge pull request #281 from crazymaster/master

Fix a wrong(duplicate) snippet in processing
[php] [symfony] some bugfix and improve

symfony snippet `ent` now support abstract class
Merge pull request #282 from chrisyue/master

[php] [symfony] some bugfix and improve
Ruby strf snippet

strf snippet contains a template that should format time in the same way
as `Time.now` default output.
Merge pull request #283 from bsutic/ruby-strftime

Ruby strf snippet
fix css_block