Basic fixed-float libor swap
Removed QL 1.2 methods
Small edit to test_mlab.py
Added pydate: accomodate python dates and strings as inputs
Restaured QL 1.2 compatibility
All enumerations in util/enums.py
PEP8 clean up
Added properties to interest rate index
Merge pull request #32 from phenaff/feature/swap

Basic wrapping of fixed-for-float swaps