Implemented matrix.get for a set
Implemented methods get, set, map, indexOf for Matrix. Some fixes in Matrix and Range.
Renamed some internal variables for more clarity
Implemented Range.parse
Implemented getting and setting submatrices in the Parser
Changed Matrix.get and Matrix.set to one-based instead of zero-based.
Created a single method _validateIndex to replace a quite some type/range checking in the Matrix prototype
Moved test files
Implemented Matrix support for all methods