Added parsing of oracle inner forign key constraint
Widen the visibility of the parseField method so it can be overriden. Implement the parsing of primary key of oracle tables. This concludes #42.
Added test for internal primary key constraint
Added keyword primary
Fixed equals method to compare the field number and index number
Add test sql for inner oracle primary key
Adjust the findPrimaryKey methods to search for the primary key and only as fall-back the unique key that starts with PK_. This resolves #79.
Added a value for the primary key. This implements #71 and is a prerequisite for #42
Tagging the 2.1.0 release of the Sahits codegen project
Completed the test document
