Web interface: Be more careful when url encoding things.

Some characters weren't url encoded.
Lite builds: Fix a minor inconsistency regarding the output directory.

Lite debug builds use "mpc-hc_x??_Debug Lite" while release builds always used "mpc-hc_x??" for both normal and lite builds.
Vobsub: Avoid parsing the complete subtitle entry when possible.
Vobsub: Support animated subtitles (with fade in/out).

This commit fixes #1814.