Update VP5 video card list (added GeForce GTX TITAN and other).
PPageInternalFilters: Fix typos.
PPageExternalFilters: cosmetics.

* Use more meaningful functions names.
* Use correct visibility for the members variables and functions.
update lcms2 to b58cb85
cosmetics
Changelog: move old entries to Changelog_old.txt
Initialize variables in the constructor.
Cppcheck fixes:

* reduce variable scope
* remove unneeded variable assignments