Exposed forwardRate function.
WIP Expose FixedRateBondHelper
fix for compiling the BondRateHelper
Perform explicit cast on BusinessDayConvention field.
Add BondHelpers to api.
don't let a pass causing a segfault ... changed for a NotImplementedError ...
Merge branch 'master' into enh-bond-helpers

Conflicts:
	quantlib/termstructures/yields/yield_term_structure.pyx
Whitespace cleanup.
Unit test for bond helper.
Deal with issue_date being None by default.
Remove commented-out code.
Import RateHelper.
Merge pull request #55 from enthought/enh-bond-helpers

Expose BondHelper and FixedRateBondHelper