GUI: Fix for bug 6719 (last line of help missing)

Since 1.4 the font changed from a 14 to 15 pixel height wich causes
one line of help text no longer to be shown. By changing the padding
of the buttons the last lines fits again.
MADS: Add md5 checks for the asound.00* sound drivers

The implementation of the sound driver code relies on the data for each
sound being at specific locations in the files, so this ensures that
if any language version changes the sound files, we'll know about it
MADS: Remove unused variable
WII: missing ASCII codes for some keys
GCW0: Initial code for GCW Zero port
PRINCE: Fix potential out-of-bounds write (CID 1248504)

There are kMaxTexts text slots, so kMaxTexts itself is not valid.
PRINCE: Fix potential out-of-bounds reads (CID 1248500, 1248503)

Since heroSetTable[] is an array of int, use >= ARRAYSIZE() instead
of > sizeof().
PRINCE: Fix potential out-of-bounds read (CID 1248502)

Since _opcodes[] has kNumOpcodes elements, kNumOpcodes itself is
not a valid index.
ZVISION: Fix memory leak (CID 1109659)
PRINCE: Fix warning
PRINCE: Fix variable sign
PRINCE: Fix another variable sign
GCW0: Further work on the port
GCW0: Correct launch options
GCW0: Enable analog joystick by default
Merge pull request #524 from AReim1982/WII-1.7.0-Beta-2

WII: missing ASCII codes for some keys
BUILD: Install the theme-able SVG icon

Add missing hicolor SVG icon to install. Retain older pixmaps xpm icon
for now.
GCW0: Create log file at game launch
GCW0: Create target with unstripped binaries
BASE: Display virtual keyboard and keymapper in game options