Added nyx-script parser (antlr4 grammar).
First test parsing a page.
Added text, including unit tests.
Added image.
Correction: media:pic has 'id:'.
Added 'delay'.
Test for PageIds starting with an 'E' (problem in old TeaseMe downloader).
Download flash tease including images.
Added 'action:buttons' and 'action:yn'.
Download random images.
Added 'hidden:sound'.
Delay style might be quoted.
delay/buttons range-target.
Implemented set/unset instructions.
Implemented goto() action.
Delay time might have no time unit (should default to seconds).
Added list with unimplemented nyx-features.
Merge branch 'feature/nyx-download' into develop