ready for 1.0-b2 development
refactoring of sample project
refactoring of sample project(introduce bootstrap)
better thread management(shutdown all executor services in servlet's destroy method to avoid hanguped thread issue in some servlet containers)
add max data size check for DefaultSessionAwareTimeoutDataManager and add tests
Merge branch 'release/1.0-b2' into develop

Conflicts:
	asta4d-archetype-prototype/pom.xml
	asta4d-archetype/pom.xml
	asta4d-core/pom.xml
	asta4d-doc/pom.xml
	asta4d-sample/pom.xml
	asta4d-spring/pom.xml
	asta4d-web/pom.xml
	pom.xml