Fixed some small bugs
changed delimiter for named file_specs from . to / to make it look more like a path and less than an ActiveRecord scope
Updates to base_dir DSL method:

* add method
* use base_dir to define rtfile_dir, rather than hard coded.
Allow two formats for file_spec: named entries in Rtfile, direct glob pattern.
Make FILE_SPEC_DELIMITER configurable via global constant
Guarantee a trailing slash on every base_dir
Added documentation for validation's --input option
Fixed file_pattern in Rtfile template
Implemented first validation command using new validation API
Updated move command
Updated documentation