Single quoted strings
Extract single quoted string tests to own file
MOve ElixirParsingTest to correct new parser_definition namespace
Double quoted string with interpolation

Parse double quoted string with interpolation with arbitrary recursive
nesting.  Double quoted strings are broken into string fragments and
interpolation segments.  String fragments are continous ranges of string
literals.
Fix bug with adjacent single-quoted strings

`'one' 'two'` should cause an error because an EOL has to follow a
single-quoted string, but the SINGLE_QUOTED_STRING macro was missing a
'\' so it was matching on a literal single quote instead of the escape
of a single quote.
Syntax highlighting and color settings for strings

Separate highlighting for single-quoted string (String), double quoted
strings (Interpolated String), and interpolation boundaries (Expression
Substitution Mark).  Color setting names are copied from those used by
Rubymine to ease Ruby developer adoption.
Extract escape sequences from string fragments

Extract valid escape sequences, \" and \#, from STRING_FRAGMENT so that
escape sequences can be highlighted with a different color.
Add issue #2 test case

Use test code submitted by h4cc (Julius Beckmann) that didn't work with
only comment support, but does not work with comment and interpolation
support.
Update changelogs and screenshots for v0.0.3