Custom Judgements, Map Archiving, And Map Offsets

Thanks to Yokakko for suggesting custom judgements and to Adri for implementing them.
Thanks to Kade M for implementing Map Offset.

Added

• Archive maps. While in the song select, press F8 (default) to archive the currently playing map as a .psm file. You can find the .psm in your Songs folder.
• Individual Map Offset. Useful for converts, this is a value inside a map .psc file that changes the offset of the map (not user friendly). This offset stacks on top of the global offset value (if you have a global offset of -7ms and a map offset of 5ms the total offset for the map would be -2ms)
• Added 'MapOffset" value to config. Lets you choose the map offset before converting.
• Custom Judgement values. You can change judgements in game with a slider, or in the config file under the [Judgements] section

Changed

• Check the songs database on launch, if there are no found songs, refresh the database. This should fix some issues where the songs would dissapear and require a manual refresh to bring back.

Deprecated

• Update checker at launch. Pulsarc's server is shutting down soon (if it's not already) so there is currently no use to have the updater.