Cleaned up some unneeded data files

Removed task list files from data
Added .gitignore to data, _cache, and _deleted to avoid inadvertantly
checking personal data in
Also fixed some parser bugs: missing defaults on task regex matches
Removed unwanted data files
Removed apigen.neon file from check-in
Small styling changes

New note dropdown symbol.
Refined margin sizing.
Removed unused CSS file (tabs.css)

All in style.less now
Icons replaced to images becuase it conflicts with default apache2 alias
Merge https://github.com/MrBertie/taskpaperplus

Conflicts:
	conf/config.php
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