using g++-4.9
Moved symbTable creation logic to symbol_table.cpp
using createSymbTable in Let & LetRec
Added boolean?
Fixed 'string?'
Added number.h
Amended number functions
added 'max'
Parsing floats
Improved exc handling
Added ability to amend redefine values in symb. tables
Adding profiling
Added MockTokenStream
extracted libsketch
Adding tests