python - be: Reorder initialization process.

Log Message:
-----------
Reorder initialization process.
Don't import everything on _init. Helps with portability to not rely on it so
heavily. Also, the new style allows for more incremental initialization that
gives the user the ability to attempt fixes between attempts.
(tho, unlikely to occur often).

Modified Files:
--------------
be/src:
pl.c (r1.23 -> r1.24)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/python/be/src/pl.c.diff?r1=1.23&r2=1.24)