Updating MG build tool to work with GitHub and as a standalone project not included with MG source files
Added target to clean up working directory after the build is finished
Removed some echo commands in the git macrodef to clean up the console output
Updated local.properties.example file
Added a Git macrodef to push all tags to remote
Added call to new macrodef in the release target to push newly created tag to remote
Added a version.name property so the name of the tag could be set independently of the version number
Updated instructions for building a release. Updated profiles settings