Changed to ignore example folders.
Flatten cell ids before using.

Fixed
-----
* Flatten cell_ids array. This fixes a problem where if the array is 0D,
  it can not be squeezed along axis=1.
Fixed typecasting error.

Fixed
-----
* The ufunc, around, was producing a float array but was passed an int
  array for output.
Use floats for testing data.
Removed print statements.
Run unit tests with nosetests and landlab.test().
Merge remote-tracking branch 'upstream/master' into fix-landlab-test

Conflicts:
	.travis.yml
	landlab/grid/raster_funcs.py
Merge branch 'fix-landlab-test' of github.com:mcflugen/landlab into fix-landlab-test
Skip netcdf4 tests if netCDF4 is not installed.
Merge branch 'placeholder' into fix-landlab-test
Moved drivers into examples folder.

Moved
-----
* Moved driver modules into the examples folder so that they are not run
  when the unit tests are run.
Import tested classes/functions into doctests.

Changed
-------
* Import all classes, functions, etc. that are used in doctests. Apart
  from being clearer, this allows more robust testing.
Added defaults for test method.
Script that runs tests for an installed landlab.
Fixed DeprecationWarning.

Fixed
-----
* Fixed deprecation warning when array shapes don't match.
Fixed DeprecationWarning.

Fixed
-----
* Fixed deprecation warning caused when indices into arrays are floats,
  not ints.
Merge branch 'mcflugen-fix-landlab-test' into placeholder