fixed a few netCDF stuff, form_arrays instead of from_list
fixed docstrings in core/_reshape.py
fixed minor bugs
Merge branch 'master' into dev (was forgotten!)

Conflicts:
	Tutorial.ipynb
	dimarray/core/_indexing.py
	dimarray/core/axes.py
	dimarray/core/core.py
	dimarray/io/nc.py
Locator_axis and Locator_axes, wrote `put` method and rewrote a big
chunck of the _reindexing.py module
modified core to da
major changes to `take` parameters, needs debug