Remove old tests
Rebuilt run function
Working but verbose
Fix parser and tests
Add no direction test for msisdn filter
validate date in argparse
Merge branch 'feature/issue-4-clean-old-code-and-full-tests' of github.com:praekelt/vumi-go-data-tools into feature/issue-4-clean-old-code-and-full-tests

Conflicts:
	gdt/tests/test_gdt.py
Merge branch 'develop' into feature/issue-4-clean-old-code-and-full-tests

Conflicts:
	gdt/tests/test_gdt.py
fix tests merged in from #5
Merge branch 'feature/issue-4-clean-old-code-and-full-tests' into develop