add: more possible options to the default options
refactor: global definitions
style: changed ui color to grey

(more inky)
bugfix: async callbacks and context binding
add: 'use strict' statement to tests
test: add some tests for options
Merge branch 'add-tests' into development
create: languages.json
refactor: split saveFile into own function
add: allow local templates in 'test/templates' dir
update: change template extension to '.jst'
add: create file.symbol property for other langs
refactor: minor async & style updates
Merge branch 'other-languages' into development