Change the array constructors to use dynd by default instead of numpy
Add the dev channel to the build script env creation
Fix option tyo
Fixes for python 2.6 and 3.3

The biggest fix was to not use exec for functions fed into numba.
Exec-ed functions don't have source visible to inspect.getsource(),
so were triggering the meta library usage.
Use dynd's ability to construct from iterators instead of a separate fromiter method
Tweak the constructor to use the udtype or dtype dynd constructor depending on the input
Add special-casing for barray so it handles iterators as before
Add field access to record arrays via attribute lookup, improve record array support
Merge branch 'master' of github.com:ContinuumIO/blaze into xdata
Comment out dynd temporarily
Added the blocksize as a parameter to bparams
Remove a stale printf