return a HashMap so groupID is available for createGroupPad
Fix #1: Convert numbers in long
Fix #3: Support API of version 1.2.0
Changed API_VERSION to 1.1
Changed request type of listAllGroups to GET
Changed README.md
Merge pull request #4 from Gared/develop

Supports API of version 1.2 of etherpad-lite
Merge pull request #2 from mattmackenzie/master

return the HashMap from createGroupPad