Added validation Scribble test directory.
Added *.swp to .gitignore.
Adding AST classes.
Merge pull request #35 from rhu1/rhu1/wf/initial-integration

Rhu1/wf/initial integration
Revert "Rhu1/wf/initial integration"
Merge pull request #36 from scribble/revert-35-rhu1/wf/initial-integration

Revert "Rhu1/wf/initial integration"
SCRIBBLE-164 Fix grammer inconsistency between command line and Eclipse.
Merge pull request #37 from objectiser/SCRIBBLE-164

SCRIBBLE-164 Fix grammer inconsistency between command line and Eclipse.