[sword-devel] Implemented writable interface in RawText

[Troy A. Griffitts]

Our most common Bible module driver-- RawText-- now is writable.  This
will allow editing of most of our existing modules.

The implementation appends the new entry to the end of the datafile. 
Lot's of editing will produce a bigger and bigger data file.

I'm hoping to add a 'getModifications()' option to this driver that will
find appended entries.  This will allow us to put in a 'Submit Edits'
option in the frontends and allow users to submit changes for modules. 
I think this will be useful.

This is one idea that came from dinner with Jerry and Geoff Hastings
last week.  It was nice to finally meet someone in person from the
project.  We had a good brainstorming lunch!

	-Troy.