added logo to the online docs
moved quick-search panel
added logo with white sign

updated links in cheatsheet
renamed directory for Mat tutorial 
changed links from willow docs to opencv.itseez.com, from Trac to current Redmine

Added reference to Nvidia TADP into Android tutorial; refactored both Android tutorials; fixed some rst warnings

Added the OpenCV with Visual Studio tutorial. Enhanced, extended the Windows Installation one. Some minor CSS changes to avoid unnecessary large spaces inside enumerations in the tutorials. 

Reformatted the TOC tables in tutorials to look just as good in PDFs as in HTML. Updated the default.css_t too for this. Added the "Windows Install" tutorial (with videos). 

Some reST syntax correction. Now the PDF documentation builds correctly under Windows using MIKTEX. Some update on the tutorial structure. Some CSS syntax correction. Windows Install Tutorial v0.4.