improve taxe and price + refactoring
Merge branch 'master' of
https://github.com/qalingo/qalingo-b2c-engine.git

Conflicts:
	apis/api-core/api-core-common/src/main/java/org/hoteia/qalingo/core/ModelConstants.java
	apis/api-core/api-core-common/src/main/java/org/hoteia/qalingo/core/web/mvc/factory/impl/ViewBeanFactoryImpl.java
clean and fix previous merge