Start test work for Exercise 2
added basic tests for integers and floats
Configured some types and added a float type.
Having issues
Fixed a bug with regex matching
Difference between grammar rules for types
Added separate grammar rules for integers and floats
Fixed test helper so that it can deal with floats
Added tests for mixing integers and floats
Completed mixing floats and ints
Merge branch 'integers_and_floats' into develop