Update Main.java
Update TableHolder.java
Update TableHolderFactory.java
Update DBTableTest.java
Update TableHolderFactoryTest.java
Update TableHolderTest.java
Update Utility.java
deleted extra files
Small fix of output on corruption for ShowTables

Remove instance tracking from provider
JUnit // rev.1

Still plenty of bugs and no tests...
JUnit // rev.1.01

style
Interpreter test added.
Small fix of output on corruption for ShowTables

Remove instance tracking from provider
Add adaptor for table
Nullability support, various fixes.
Updated tests to work on structured version.
null-value tests.
Implemented methods not mentioned in task statement.
Refactoring and some fixes backported from 05-Structured.
Update DBTable.java