build.bat: Call update_version.bat when using /GetVersion switch to make
sure that we get current data.

Additionally change the way how data is extracted from files. This
resolves build.bat fail when we are in detached git mode and branch is
reported as ("no branch").
build.bat: cosmetics
Merge pull request #55 from kasper93/batch

build.bat improvements
Added support for DTS-HD bitstreaming (HDMI).
updated resources for 1eae5784f5 (DTS-HD HDMI)
(only Russian and English, because synchronization is not working)
cosmetics
updated resources for 1eae578 (DTS-HD HDMI)
(other languages)
Some testing on SetAlwaysOnTop. (not working)
Remove unused string.
Avoid using hardcoded URL for the website.