Test filtering

[BastianBlokland]

Support running only a subset of the tests, useful for faster iteration times during development.

Also renames all tests to add a [LIBRARY] prefix to allow easier filtering, also it looks pretty :)

 86/145 Test  #86: [parse] Parsing struct declaration statements ...................   Passed    0.00 sec
        Start  87: [parse] Parsing union declaration statements
 87/145 Test  #87: [parse] Parsing union declaration statements ....................   Passed    0.00 sec
        Start  88: [prog] Copy
 88/145 Test  #88: [prog] Copy .....................................................   Passed    0.01 sec
        Start  89: [vm] Execute calls
 89/145 Test  #89: [vm] Execute calls ..............................................   Passed    0.01 sec
        Start  90: [vm] Execute constants
 90/145 Test  #90: [vm] Execute constants ..........................................   Passed    0.01 sec