new builds, added vcruntime140.dll
better build script.

The previous build script used full version numbers in the librarie filenames which are thus not recognized by luarocks. This changes to major.minor instead of major.minor.fix.
now it builds 5.1.5, 5.2.4, 5.3.5, 5.4.0-beta
new build script and builds.
source dump from lua.org for lua 5.3.5