Update .gitignore
Update .gitignore

add - 
# QuickBuild
.qbcache/
CFY-977 added version file
CFY-977 added version file
Merge pull request #11 from cloudify-cosmo/feature/CFY-977-version-file

CFY-977 added version file
CFY-977 bump version to 3.1
Merge branch 'develop'