[PLT-431] New instrument: CouponFixedFxReset. Added and tested Definition version. Derivative version in draft.
[PLT-431] Finished CouponFixedFxReset coverage and tests.
[PLT-431] Improve test coverage.
[PLT-431] Pricing method with simplifying assumption implemented.
[PLT-431] Corrected test annotation.
[PLT-431] Added tests with FX reset swap. Move a inner class of PresentValueDiscountingCalculator to a util class and reuse it in CurrencyExposure.
[PLT-431] Clean equal methods.
[PLT-431] Added references to documentation. Added null check.
Merge branch 'develop' into topic/PLT-431

Conflicts:
	projects/OG-Analytics/src/main/java/com/opengamma/analytics/financial/provider/calculator/discounting/PresentValueDiscountingCalculator.java
Merge pull request #204 from OpenGamma/topic/PLT-431

Topic/plt 431