Alternative profile support

[eruffaldi]

No description provided.

[jonathanaamiller]

When I build this and run it, templates based on the 'tiled' layout fail with the following error:

  File "/usr/local/bin/itermocil", line 11, in <module>
    load_entry_point('itermocil==0.2.1', 'console_scripts', 'itermocil')()
  File "build/bdist.macosx-10.12-x86_64/egg/itermocil.py", line 783, in main
  File "build/bdist.macosx-10.12-x86_64/egg/itermocil.py", line 89, in __init__
  File "build/bdist.macosx-10.12-x86_64/egg/itermocil.py", line 603, in process_file
  File "build/bdist.macosx-10.12-x86_64/egg/itermocil.py", line 259, in arrange_panes
NameError: global name 'k' is not defined```

Attached a patch that  seems to fix it.
[tiled_patch.txt](https://github.com/TomAnthony/itermocil/files/1130565/tiled_patch.txt)