Merge pull request #6 from devplanter/jack

Update logout on POS screen
Merge pull request #7 from devplanter/jack

Update changelog
Merge pull request #8 from devplanter/jack

Code cleaning
update Product and BillItem entity
update Product class
update db script add field cost_price in Product table
Commit
Merge branch 'master' of https://github.com/devplanter/coffeepos into jack

Conflicts:
	coffeepos-ejb/target/classes/META-INF/maven/com.dp.coffee/coffeepos-ejb/pom.properties
	coffeepos-web/target/m2e-wtp/web-resources/META-INF/maven/com.dp.coffee/coffeepos-web/pom.properties