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
Updated Catalan translation.

Refs: #2408.
External filters: Use two separated list for x86 and x64.

x86 filters only work with MPC-HC x86 and vice-versa.
Add some options to give a finer control on subtitles track selection.

The user is now free to choose if MPC-HC must prefer forced/default subtitles tracks (default is on) and if MPC-HC is allowed to change the subtitles track an external splitter selected to be the default (default is off).
Fix duplicated line endings and add the line missing in Japanese and Simplified Chinese translations.
Merge pull request #55 from kasper93/batch

build.bat improvements