Implement and test outputting finding locations
Merge pull request #137 from Kha/finding-locs

Output finding locations
Construct FIRM graphs for simple Integer arithmetic expressions
Count number of variables in methods for firm graph creation
Merge pull request #139 from TehMillhouse/num_vars

Count number of variables in methods for firm graph creation
Merge pull request #140 from jspam/053-firm-integer-arithmetic-expressions

Construct FIRM graphs for simple Integer arithmetic expressions
Compiler: FirmConstructor phase
firm: Expand type mappings