Improve Makefile Build System

[DepthDeluxe]

The Makefile is a little bit nasty and hacked together. There are a lot of pattern substitutions and no implicit rules which needs to change. There are also some debugging rules that should be taken out.

• make configuration user independent (i.e. no /user/colin/.../)
• no more pattern substitutions
• implicit rules
• remove debugging information

[DepthDeluxe]

#19 is related to this

• allow for GDB debugging