Remove print statement from Date converter.
Do imports from .api
Add rate helper for Euribor futures.
Expose interpolation method.
Remove 'return 0'.
WIP add FixedRateBonds to market
Adjust evaluation date when setting bond data.
Merge remote-tracking branch 'origin/enh-bond-helpers' into enh-euribor-market

Conflicts:
	quantlib/market/market.py
(Partial) pyflakes cleanup.
Improved API for make_bond_helpers.
Unit test for Euribor futures.
Unit test for fixed rate bond quotes.
Merge pull request #56 from enthought/enh-euribor-market

Add Euribor futures and fixed rate bond helpers to Market.