Updated to Version 4.3.0.0
Updated to Version 4.3.2.0
New build script and documentation on building

New build script and documentation on building from source by ether
using the new build script or building manually.
Correct link to the new documentation on building
Updated to Version 4.3.4.0
Updated to Version 4.3.6.0
Added info about GitHub on Windows.
Added info on what AutoIt version to download.
Merge remote-tracking branch 'upstream'

* upstream:
  Added info on what AutoIt version to download.
  Added info about GitHub on Windows.
  Updated to Version 4.3.6.0
  Updated to Version 4.3.4.0
  Correct link to the new documentation on building
  New build script and documentation on building
  Updated to Version 4.3.2.0
  Updated to Version 4.3.0.0