Fix libtorrent types forward declaration errors/warnings.
Merge pull request #2060 from glassez/fwd_decl_fixes

Fix libtorrent types forward declaration errors/warnings.
Prepare WebUI resources.

Html/Css/JavaScript files displacement.
Also add new icon.
Modify Http parser/generator classes.
WebUI core redesign.
Merge pull request #1890 from glassez/webui

WebUI Core Redesign
Add back contact info in the copyright notices.
Remove unused variables.