add user store

git-svn-id: https://brain-invoice.googlecode.com/svn/trunk@17 e6ef879c-6efb-f92a-4ca0-37fcd3c99b0e
add product store test from netbeans

git-svn-id: https://brain-invoice.googlecode.com/svn/trunk@18 e6ef879c-6efb-f92a-4ca0-37fcd3c99b0e
add user store

git-svn-id: https://brain-invoice.googlecode.com/svn/trunk@19 e6ef879c-6efb-f92a-4ca0-37fcd3c99b0e
Merge https://github.com/yudhik/brain-invoice

Conflicts:
	brain-invoice-model/src/main/java/com/brainmaster/apps/invoicing/model/ProductStore.java
	brain-invoice-model/src/main/java/com/brainmaster/apps/invoicing/model/Store.java
	brain-invoice-model/src/main/java/com/brainmaster/apps/invoicing/model/id/ProductStoreKeys.java
	brain-invoice-model/src/test/java/com/brainmaster/apps/invoicing/ejb/IntegrationModelRepositoryBean.java
	brain-invoice-model/src/test/java/com/brainmaster/apps/invoicing/ejb/test/IntegrationModelTest.java