removed rvmrc #119
add default contributing guidelines from Github.
Merge pull request #121 from 2rk/contributing-guidelines

add default contributing guidelines from Github.
Merge pull request #120 from 2rk/remove-rvmrc

removed rvmrc #119
Ignoring Ruby Gemset file
Update contributing section using Github Guideline.
Merge pull request #130 from pragmaticivan/feature/ignore-ruby-gemset

Ignoring Ruby Gemset file
Updating CONTRIBUTING.md, Adding link and instructions about CodeTriage.
Merge pull request #131 from pragmaticivan/feature/contributing-github-guideline

Update contributing section using Github Guideline.
[ci skip]

Fix URL removing "]"
Merge pull request #132 from pragmaticivan/feature/contributing-github-guideline

Removing "]"