fridibi: disable glib

Fribidi uses glib incorrectly, and apparently raises a compilation error
with newer glib versions. Since glib is not really needed, just disable
it.

Untested, but a user reported adding --without-glib works fine.
move debian/changelog to debian/changelog.TEMPLATE
and drop version control on debian/changelog, which gets modified by
scripts/debian-update-version
add rm -rf build_libs to debian/rules override_dh_auto_clean:
so that it isn't still hanging around between builds
minor whitespace tweak
add gitignore file for separately tracked repository directories and build-time files
add more debian build files to .gitignore
just call ./clean in override_dh_auto_clean: instead of calling each of the clean scripts individually
add dependency on gcc-4.7 or gcc-4.8 for arm (needed for atomic builtins)
recommend dpkg-buildpackage over debuild

dpkg-buildpacakge
* does not create a source tarball (can take a while)
* does not automatically run lintian
on second thought, it looks like dpkg-buildpackage runs into trouble.
For some reason it ignores override_dh_auto_install and tries to
incorrectly guess how to install mpv.

Revert "recommend dpkg-buildpackage over debuild"

This reverts commit 5b4fc57391d6f58e11a1af4e9f436606bd0395c5.
debian package: small fix to README.
dpkg -i mpv-build-deps_*.deb
since the package name will vary with version
untab debian/rules makefile comment to avoid emacs complaining