removed not used account level access, added service upload properties
merge with master
removed not existent call
[ENGAPI-15:added multiple account to addAccounts for groups and removeAccounts]
[#ENGAPI-13: added upload with two scopes, groups and properties, they can be done alone or combined]
Fix an error in upload (when try to use groups and properties at same time)
Merge from master
[maven-release-plugin] prepare release 0.8.4
[maven-release-plugin] prepare for next development iteration