Feature : CI property file generation

Adds support to buildenv.bat to store the Environmental Variables(EV) in a .properties files in the form of key pair values "key=value". 

This will allow the same EVs set by buildenv to be injected into the CI build environment. These can then be used by the CI to build any project which uses the EVs set by buildenv.

Additional build support added to buildenv should also be added to the CI properties output.