Merge pull request #18 from jagrem/master

Refactor tests and remove Python 'magic'

Closes #6
Prepare 0.5.0 release
Add escaped variables to the grammar
Merge pull request #19 from jugglingnutcase/escape-variables

Add escaped variables to the grammar

Closes #14
Prepare 0.6.0 release
Chill out that line continuation regex
Consider any backticked character to be escaped
Merge pull request #20 from jugglingnutcase/fix-line-continuations-and-escapes

Fix line continuations and escapes

...again :(
Prepare 0.6.1 release