always use spring bundles from config
multiversion support for replays & cleanup
cleanup
cleanup includes
add GetDefaultNick to settings
remove customizations.*:
as it requires lsl to be loaded at start
if we want to customize icons, we should read icons from filesystem
cleanup / fix springsettings linking
astyle
slconfig: remove support for global config

the global config it is not unused anyway
it simplifies the slConfig class and will eventually allow
to get rid of the settings class all together.
slconfig: remove HasSection, use Exists of base class
use base class SetPath
define macro to set defaults

The defaults are set during static initialization, so every code
after that can use them. Other code during initialization should
not relay on the defaults.
The interface is inspired by the one in spring RTS engine.
move config initialisation from Settings to slConfig::Create()

this allows to create slConfig on first access trhough Get()
use assert instead of warning on redefinition of default

also clean up a bit and provide more usage examples for the macro
define better to use ReadX() methods

this methods will also fail with an assert if no default was set
the default Read() methods of the base class are left alone
and available for advanced usecases
make Default::Get actauly work
simplify Default::Set()
fix ReadBool()
add shorter name to access slConfig: cfg()
move settings setup from springlobbyapp to settings

set defaults using SLCONFIG()
FIXME: useractions can not be setup in settings