account for package renaming hoohah in newer versions of boto
Merge branch 'master' of github.com:migurski/TileStache

Conflicts:
	TileStache/S3.py
patched tilestache-seed to allow for retries and to write failed tile requests to a log file
Added Disk cache quadtile directory layout
Added some documentation for quadtile cache directory
update api docs for s3 cache changes
Merge pull request #101 from bwg/s3

Make access/secret properties optional for S3 cache, add path property
Merge branch 'master' of github.com:migurski/TileStache

Conflicts:
	TileStache/S3.py
	scripts/tilestache-seed.py
JSON all the things – untested
add getTypeByExtension to MBTiles; remove merge cruft (in S3.py); bump VERSION
update tilestache-seed.py to reflect reality; not sure how that happened
Add Vector Provider Tests
Merge pull request #100 from bwg/retina

Remove hard-coded 256px tile dimensions from providers
Merge pull request #102 from straup/master

Teach MBTiles.py to serve JSON
Merge pull request #105 from RBURHUM/vector_tests

Add Vector Provider Tests
Bumped to 1.45.0 with changes to S3, Sandwich, MBTiles, Disk and other cache & providers
Fixed alpha-channel issue in Sandwich provider
force preview to 256x256 tile dimension
Copied in mostly-working VecTiles code.
Added documentation for VecTiles.