Fix Propel writer not opened and enhance error handling in document, fix #72.

Signed-off-by: Toha <tohenk@yahoo.com>
Move translateVars() to base class, descend class now can override the getVars() method to provide variables.

Signed-off-by: Toha <tohenk@yahoo.com>
Update Propel filename output.

Signed-off-by: Toha <tohenk@yahoo.com>
Table comment parsing, DateTime type hinting
Shorter vendor namespace
Switch collection getters to return native array
Ability to skip relations and manually specify column types
Add PSR-0 autoloading