removing mention of getOnExist from the README
Removed 'getOnExist' functionality from Entity and Group
Removed 'getOnExist' test case
Updating test cases for createEntity and createGroup
Updating test example to remove 'getOnExist'
Revved the version to 0.11.0. Updated README and CHANGELOG
Updating build artifacts with new version number
Merge pull request #79 from r3b/DPS-888

removing 'getOnExist' functionality from createEntity and createGroup