Update .gitignore

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# QuickBuild
.qbcache
Update .gitignore

add -
# QuickBuild
.qbcache/
CFY-977 added version file
CFY-977 added version file
Merge pull request #31 from cloudify-cosmo/feature/CFY-977-add-version-file

Feature/cfy 977 add version file
CFY-977 bump verison to 3.1
CFY-977 revert rm dev-requirements.txt
Merge branch 'develop'
merge develop branch