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eol handling
fix #105 - improve syntax highlighting for doc comments

- minimal syntax def for doc comments
improve doc comments highlighting for remaining comment styles
add tests for doc comments syntax def
edit gitignore
remove -hidden prefix from .tmLanguage extension

Due to a bug in ST, it is currently not possible to include a
source scope defined in a .hidden-tmLanguage file, in a
differnt .tmLanguage file.

To work around this, temporarily remove the -hidden prefix.
Merge pull request #383 from guillermooo/better-doc-comments-syntax-def

Better doc comments syntax def