Re: CompileBL Scenario

Following up on this I've subclassed the compiler and source template 
class. The compiler now loads
- the Blocklayout tags from the lib/xslt/tags directory
- the Xaraya core tags from the newly created lib/xaraya/templating/tags 
directory
- the custom modules tags from each module's tag directory

This leaves 3 sys::import calls in Blocklayout, which load exceptions, 
logger and variable stream classes respectively.