[PLAT-3154] Added new calculators.
Adding new provider and calculators.
Merge branch 'develop' of github.com:OpenGamma/OG-Platform into develop

Conflicts:
	projects/OG-Analytics/src/test/java/com/opengamma/analytics/financial/forex/provider/ForexDiscountingProviderMethodTest.java
	projects/OG-Analytics/src/test/java/com/opengamma/analytics/financial/forex/provider/ForexOptionVanillaBlackSmileMethodTest.java
Improvement on pricing Option on STIR futures with stochastic spread.
Merge branch 'develop' of github.com:OpenGamma/OG-Platform into develop

Conflicts:
	projects/OG-Analytics/src/test/java/com/opengamma/analytics/financial/forex/provider/ForexOptionVanillaBlackSmileMethodTest.java
Merge branch 'develop' of github.com:OpenGamma/OG-Platform into develop