Merge branch 'hotfix/v0.2.1'

* hotfix/v0.2.1:
  Fixes an issue with the vindinium server's upstart script
Merge branch 'release/v0.2.2'

* release/v0.2.2:
  Updating README with Virtual Environment information
  Some cleanup
  Bumping HHVM requirement to >=3.2, removing hhi libs
  Add long name for --map getopt
Fixes #1 and adds toImmVector() and toVector() to Util\Enum
Merge branch 'hotfix/v0.2.3' into develop

* hotfix/v0.2.3:
  Fixes #1 and adds toImmVector() and toVector() to Util\Enum
Using ImmMap<int, Hero> for heroes, NullTile for invalid positions