Updated the link for the MS Visual C libraries - I'm not sure if MS changed the location of the files but this new one leads right to the file downloads.
- Removed links from the install instructions to the installer zip files.
- Replaced "2.2.4" with "2.X.X" globally, to avoid the docs going out of
date.
1. Added a big fat warning to the Windows installer to tell user
to install Visual C++ redistributable.
2. Added a bit fat warning to the automated installer doc to
tell user the same thing.
3. Reordered entries on the table-of-contents sidebar for installation
to prioritize the most important docs.
4. Moved older installation documentation into deprecated folder.
5. Moved developer-specific installation documentation into the
developers folder.
