Now that the folder structure of the master branch is compatible with Boards Manager, there is no need for the source files in the ide-1.6.x-boards-manager branch which can now be used solely for the
Boards Manager JSON file.
This pull request goes with https://github.com/damellis/attiny/pull/95 (I had to create two because they are for different branches) which contains a more thorough explanation of the purpose.
Now that the folder structure of the master branch is compatible with Boards Manager, there is no need for the source files in the ide-1.6.x-boards-manager branch which can now be used solely for the Boards Manager JSON file.
This pull request goes with https://github.com/damellis/attiny/pull/95 (I had to create two because they are for different branches) which contains a more thorough explanation of the purpose.