initial commit
add travis ci support
add coveralls
add numeric type interface
add numeric type interface
add numeric type interfaces
remove zend filter dependency
rebase natural and whole ints onto int type
add conjugate method to complex type
add modulus method to complex type
Fix RationalTypefactory::fromFloat not recognising zero
add additional unit tests
Add negate() method to numeric types
Add isReal() method for complex numbers
Add toComplex() method for numeric types
readme changes
Add abs() method for numeric types
additional notes on readme
rebase complex type parts on rational type
complete unit tests after ComplexType refactor