Bool construct now takes an argument
Implemented nonzero methods for integers and strings
Changed array 'any' tests to be using bool construct instead
Implemented nonzero for array
Moved array implementation to array.c
Added nonzero method to float class
Added nonzero to hash class
Moved int nonzero implementation to int.c
Merged master
Merge pull request #24 from mamaar/feature/bool-construct

Feature/bool construct