Remove old sigil syntax conflicting with maps
Merge pull request #72 from ericmj/remove-old-sigil

Remove old sigil syntax conflicting with maps
Add new comprehensions
Remove non-existant operators
Remove duplicate def
Fix sigils
Merge pull request #73 from ericmj/fixes

Assorted fixes
Syntax highlighting for defstruct
Merge pull request #74 from jwarwick/defstruct

Syntax highlighting for defstruct
Clean up operator table
Add send to keywords
Regard nil as a boolean
Rename elixirName to elixirAlias
Move symbol matching to not match unused variable
Rename elixirSymbol to elixirAtom
Merge pull request #75 from ericmj/fixes-v2

Clean up operator table
Fix syntax highlighting of lowercase sigils

Closes #77.