First workings of reading without an iterator.
BPF works.
CARIS should work :)
Remove iterator from faux reader.
Remove iterator from icebridge.
Fix new IStream ctor().
Fix decimation and stats tests for new faux reader interface.
Remove iterator from las/nitf.
Fix typo.
Fix type of zip objects when we're not zipping.
Remove iterator from oci driver.
Remove iterator from pgpointcloud driver.
Remove iterator from qfit driver.
Remove iterator from sbet driver.
Fix sbet/qfit test.
Merge branch 'master' of https://github.com/PDAL/PDAL into noiter
Remove iterator from PCD driver.

Conflicts:
	src/drivers/faux/Reader.cpp
Remove iterator from SQLite driver.
Remove iterator from terrasolid driver.
Merge branch 'master' of https://github.com/PDAL/PDAL into noiter
Remove StageIterator.
Remove iterator use from reader.
Update Greyhound driver.
Merge pull request #448 from PDAL/noiter

Remove iterators from pdal readers
Update overview for readers.
Add missing image.
Merge branch 'master' of https://github.com/PDAL/PDAL
Add tree depth query to QuadIndex.