(#11) Highlight io:format control sequences

Closes #11.
(#21) Add syntax support for maps
(#21) Add indentation tests for maps

Closes #21.
Re-add ErlangShowTokensInCurrentLine

This function was accidentaly removed in
2549fb0d849e858a0f9a875c502437bf6fa9df6a.
Fix regexp in IsCatchStandalone

The previous regexp could have caused problems if Erlang had a keyword with one
of [A-Z_@] characters in it, because then the regexp would have matched
(despite the intention to match only variable names).
(#17) Add indentation support for funs with names

Closes #17.
(#17) Add indentation tests for funs with names