Move the locale init to after Sys_PlatformInit().

This makes it actually effective…
Improve purging of unvanquished-common.
unvanquished-common should own /var/games/unvanquished/main.
unvanquished-common: ask whether to download .pk3s and from where
Add new classes to owmap for navmesh generation
Partially fix corrupt MD5 weapons when rapdily changing between players on spec
Don't generate navmeshes for classes which use other classes' meshes.
Clean up SpectatorThink.
Merge branch 'debian'
Update debian/changelog.
Removal of old maps.
unvanquished-common config script contains a bashism; use bash.
Merge branch 'master' into gameplay/testing
Merge branch 'gameplay/testing'
Fix a load of human head ‘shader not found’ errors.

Seems that empty shaders are thrown away…
Fix battlesuit damage regions.
Fix vsay configuration.

This was using numbers for class and team, which is bad: various class
numbers have been changed and this file had become out of sync. Now, we use
team names and class names (from the models); class removals could cause
parse failures, indicating that the vsays file need an update.

"team" requires "aliens" and/or "humans".

"class" requires class model names, "aliens", "humans" and/or "all". These
latter three select, respectively, all alien classes, all human classes and
all classes. It's also possible to remove from the class list by preceding
with "-" (outside quotation marks): this affects the next token only, e.g.
  class aliens -basilisk -"advanced basilisk"
for all alien classes except the basilisk forms.
Remove OVERMIND_HEALTH.
“Under attack“ and “destroyed” messages from reactor and overmind.

“Under attack” messages occur when health dips below 75% and 25% unless the
same message was broadcast within the last 7½ seconds.
Restrict reactor & overmind messages to the target team.