Zoltan wk7 progress

tasks done:

1. save player inventory
2. save player name
3. save player gender //defaults to male
4. checkpoint system

new script: SaveCheckpointScript.cs (should be attached to checkpoint
signs to save
progress, checkpoint needs starter value!!!)

5. load checkpoint after death
6. save actual HUB state to DataStore

files effected:

datastore.cs
pickupscript.cs
textdisplayscript.cs
uiscript.cs
inventory.cs
door.cs
HealthScript.cs
changeSprites.cs
Zoltan; Melee attack almost done, jump fixed

needs a bit of polishing, but have to ask Brian for that.
Minor fixes

Fixed player not touching the right signs,
Fixed enemies triggering the tutorial signs
Fixed UI so that it SHOULD (untested) work on any screen res now

Scripts changed:
TextDisplayScript
UIScript
Changed Keybinding

E is now the lift/drop object button due to davids observations
Merge remote-tracking branch 'origin/LatestBuild' into ZoltanBranch