Slingshot v0.3.89 [test 100]

Changelog: 

- Fixed inconsistency in Level two, now when you enter the first level transition, the level is no longer flipped. 

- Reduced rifle base damage. 

- Changed wall jump mechanic to only be acessible AFTER the grappling introduction in lvl1. 

- Shotgun knockback now only works if you hold RMB. You get even more velocity if you jump beforehand as well. 

- Upgraded Unity and Visual studio to newer versions. 

- Reduced length of lvl2, now it should actually be the appropriate length for an early-game level. 

- Restructured lvl2. 

- Adjusted difficulty of combat encounters in lvl2. 

- Introduced new enemy type: The Sentry. 

- Sprinkled Sentries around lvl1 and 2. 

- Sentries no longer have god aim (-1) and now have, 'good' aim. (12, as opposed to the Sentinel's 8) 

- Created new model for shotgun. 

- Added dialog to startup sequence. (DanTDM?) 

- Accidentally made player start facing the wrong way in lvl2 

- Fixed player facing wrong way at the start in lvl2