introduced new PoC project
[LiquiBasePoC]

- added empty class
[UD-56]

- added simple LiquiBase test (context creation)
Sentence Test related classes added to the class diagram
Initial web layer implemented
Minor modification in class diagram
Added model elements: Sentence and Sentence Test
Business API defined for Sentence Test feature
DAO API defined for Sentence Test feature
Implemented Sentence Test Service
Stubbed implementation of Sentence Test reladed DAOs are added - only for testing and demo
Updated view in accordance with the changes of lower layers
Removed deprecated DAOs
Fixed bug: if there is no more opportunity and no correct answer the 'answer' input field is still available after reloading the page
Switched from Java 1.7 to Java 1.6

Default Java SDK is Java 6 in IBM WebSphere Application Server. Java 7 (IBM SDK Java Technology Edition, Version 7) is a feature extension found in the IBM Installation Manager repositories. However, as I can see, it is not available in case of trial version.
Revert "Switched from Java 1.7 to Java 1.6"

This reverts commit 5a1a5247dc5f1fc83b7fc6cf9f9f8ca220fcc215.
[UD-56]

- added some test modifications
	- add table
	- alter table
	- add lookup table
Simplified field names
Added ER diagram about Sentence Exam tables and generated SQL script containing DB2 specific schema definition and sample data
Initial version of Sentence and Sentence Exam JDBC DAOs - with working unit tests using embedded HSQLDB database