Building `tmLang.tmLang` fails (and so do others)

Issue #3 new
FichteFoll
created an issue

So, I had this package installed for a while and decided to finally hack on your restructured Text Improved syntax, but was unsatisfied with the chosen scopes for the tmLang syntax. I then tried to hack on `tmLang.tmLang` build apparently it doesn't build at all.

I get the following error with the unmodified tmLang bundled in this repo, which I assume to be "working":

```running function transform
#
^

Syntax Error in file 'tmLang.tmLang' at line 1 at position 1: Syntax error: Expected rule set repository
[function: transform]
[kargs: {'format': 'plist',
'infile': 'C:\\Users\\Fichte\\AppData\\Roaming\\Sublime Text 3\\Packages\\SyntaxHighlightTools\\tmLang.tmLang',
'outfile': None}]
[Finished in 0.0s]
```

Windows7, ST3 3066