0.35 - reworks

Full Changelog: 0.347...master

• added engineer build/destroy
• remade sourcescheme
• reworked hudplayerhealth to support both aspect ratios
• new winpanel (from c-sharp)
• added background for 16:9 loading screen
• added some more credits to readme

0.35 hotfix

• moved engineer stuff a bit down to prevent obstruction