Dimarray

- new feature: read multiple netCDF4 by providing a regular expression
- minor bug fixes
- improved documentation for netCDF I/O, can now be compiled using sphinx
- also include scripts to convert notebooks to rst files and then html

cd docs
make rst
make html

compat folder with basemap code to use "interp"
fixed bug: no error when importing module with no netCDF4 installation

Solved problem in operations with numpy array as LHS operator (and closed related issue)

A number of bug fixes. Dimarray was used in two big projects and a few remaining bugs were solved, mostly related to multi-dimensional indexing and array broadcasting when indexing. New attribute .box to switch from numpy-like array-broadcasting when indexing to matlab-like multi-dimensional indexing (where several dimensions are indexed independently from each other, as a "box").

This release contains a few bug fixes such as when combining arrays with monotonic axes, and additional feature for reshape: it now understands comma-separated dimension name and proceeds to grouping/ungrouping as needed.

made a reasonable ipython notebook tutorial
remains issues to be solved before it can be considered stable