[sword-devel] Verse mapping patch

[Ben Morgan]

This adds a (very simple) versification mapping class, and fixes a slight
problem in versekey with v11n of bounds.

API is something like this (I'm not sure I like the names, though...):

VerseMapMgr {
 static VerseMapMgr* getSystemVerseMapMgr()
 SWVerseMapper* getMapper(char* v11n_from, char* v11n_to);
 SWVerseMapper* getMapper(VerseMgr::System* v11n_from, VerseMgr::System*
v11n_to);
}

SWVerseMapper {
 VerseKey* map(VerseKey* from);
}

The rules of this verse mapper are very simple (i.e. it doesn't do a proper
job...)
if bound set:
  l = map(lower bound)
  u = map(upper bound)
  if u is NULL: set u to the end of l's book
  if l is NULL: set l to the start of u's book
  swap u and l if u is before l (i.e. book order is different, and bounds go
across border)
  return versekey composed of u and l
otherwise:
if book of from key isn't in to v11n: return NULL
if chapter isn't in destination v11n:
  return last verse in book in destination v11n
if verse isn't in destination v11n:
  return last verse in chapter in destination v11n

otherwise, return the same verse, but in new v11n.

This serves two purposes:
1) it defines an API which we can use later. By making getMapper return a
more intelligent mapper, we can put proper mapping in later very easily.
2) it will do a better job than just copying the text across (because it
clips, not normalizes)

God Bless,
Ben
-------------------------------------------------------------------------------------------
Multitudes, multitudes,
   in the valley of decision!
For the day of the LORD is near
   in the valley of decision.

Giôên 3:14 (ESV)
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