Updates to blaze catalog design doc
Some catalog functionality, with ipython magics
Remove 'data' keyword from datashape
Create a sample catalog in the repo, and a short RST tutorial about it
Put array str and repr in their own files
Clear out some cruft, change _choose_format to not go through numpy
Add some test cases that getting the str/repr doesn't raise
PEP8 compliance
Fix warning printouts
Merge pull request #91 from mwiebe/struct-print

Struct print
Updates to blaze catalog design doc
Merge branch 'master' into catalog

Conflicts:
	docs/source/index.rst
Remove default catalog creation, add a function for it. Tweak docs.
Merge pull request #89 from mwiebe/catalog

a basic catalog
Move blaze.air to blaze.compute.air
Fix comment in catalog __init__.py
Move blaze.bkernel to blaze.compute.bkernel
Move blaze.ckernel to blaze.compute.ckernel
Move blaze.expr to blaze.compute.expr
Move blaze.ops to blaze.compute.ops