Work on allowing creation of stand-alone blaze functions
Start on filter example
Update example for broadcasting and add elementwise explanation
Write about fusion of implementation kernels
Clarify signature in blaze function example
Start towards single air interpreter
Work on splitting up ckernel interp
Fix up some bugs from ckernel interpreter split, update some tests
Update blaze function test
Rewrite ckernels to pykernels
Rewrite out-of-core ckernels to pykernels
Fix up interpreter names
Work in sql(ite) data descriptor
Make ckernel rewriter respect execution tactics
Generate simple sql select queries
Merge branch 'master' into pyinterp

Conflicts:
	blaze/compute/air/entrypoint.py
	blaze/compute/air/environment.py
	blaze/compute/air/frontend/jit.py
	blaze/compute/air/passes.py
	blaze/compute/eval.py
	blaze/compute/tests/test_blaze_function.py
Merge branch 'pyinterp' into sqlddesc2

Conflicts:
	blaze/compute/air/passes.py
missing whitespace in install documentation
Merge pull request #148 from esc/fix/install_typo

missing whitespace in install documentation
Pull data in lazily in SQL data descriptor, handle single columns