* Now picks up (almost) all files from a tree in src/ under dir with the .iss file
* Perfect (I think) upgrade from 1.x versions
* Remove the compile defines stuff, there's only one installer version
* Good, old-fashioned unconditional installation of MSVC runtimes
To be done:
* Upgrades from earlier 2.x versions (need to collect samples to test against)
Originally committed to SVN as r3057.
