Add missing grammars

This pull request adds the missing grammars from [TurtlePie/Sublime-ECT](https://github.com/TurtlePie/Sublime-ECT) and provides support for the following opening and closing tags:

```
<% %>
<< >>
<? ?>
{{ }}
```

I'm using the file names generated by `apm` for easier maintenance in future. I also added the `fileTypes` array to each file.

Fixes #1.