Updated HL2 series

At long last! The trilogy got many new\updated feature and the Episode Two got the new Field Of View support (the june update necessary!).

HL2 - EP2:
- NEW: Added a new advanced video option that allows the user to easily change the field of view to any value they wish between 75 degrees and 90 degrees.

HL2, HL2 - EP1, HL2 - EP2:
- NEW: Add Automatic Update function.
- NEW: Progress bar.
- NEW: Add modern custom dialogs.
- NEW: Color Correction support.
- CHANGED: Small improvements.
- CHANGED: Updated Eurekalog Bug-Tracker.

HL2:
- NEW: Able to search for HL2 executable by manually.