More docs tweaks.
Removed "beta" from version strings.
Installer now gets built using NSIS Unicode

It's basically just NSIS, but with better translation support. I don't
have the original NSIS installed, hence the change.
Installer script changes.

* Requirements page removed.
* Prerequisites section added as a required option, installs MSVC 2008 &
2013, Python, wxPython, Comtypes and PyWin32 if required for the
selected install options, and if not already installed.
* Removed unused variables and function.
Fixed MSVC 2013 redist not being installed if missing.
Updated version history for 304.4.
Fixed MSVC 2008 URL and download directories.

Also made installer hide for MSVC redist install, like for Python
components.
Fix for locating Java executable.  It previously would fail if the only Java installed wasn't the same bit-ness as Wrye Bash.
.gitignore and .gitattributes
Added a couple more git ignores.
Fixing lack of newline at end of .gitignore.
Fixed overly long URLs in installer.
Removed trailing whitespace in installer.

I've swapped my Ctrl+S shortcut in Notepad++ to the trim trailing
whitespace then save macro, so I don't need to remember to do it!
Added MSVC 2005 handling to installer.

Also updated version of Python used from 2.7.3 to 2.7.6.
Trimmed trailing whitespace in readmes.
Updated readmes for MSVC 2005 & Python 2.7.6.
Refactored installer code.
Merge branch 'wrinklyninja-installer-update' into develop
Optimize PNGs

546 files processed.
2,129,241 bytes saved (27%)
Cures libpng sRGB
warnings.
Strips all useless Metadata out, while retaining Quality.
27%
less File Size/Loading Time.
Remove all references to the Bash auto-updater