Removed ext subpackage in provider module.
Fixed livence headers.
Merge branch 'master' of https://github.com/JavaMoney/javamoney.git

Conflicts:
	money-api/provider/src/main/java/javax/money/provider/ExposedExtensionType.java
	money-api/provider/src/main/java/javax/money/provider/MonetaryExtension.java