Support for %declare keyword and bugfixes

Replace all \s with [ \t] to prevent matching newlines

Fixes #7

Comment support and improved regex detection

v1.2.1

Merge branch 'sublime_text_comment_support'

Fixed handling of escaped quotes and removed association with '.lr' file extension

v1.2.0

Remove .lr extension

v1.1.1: Removed .g file type

Since .g is the old file type that's associated with ANTLR, I removed it from Lark highlighting. Especially since people should still be able to select it themselves if they need to.

v1.1.0

Code cleaned up and remaining language features added

v1.0.0

Initial commit