FIX: add 'QN' header token to RADOLAN reader (#154)

* FIX: add 'QN' header token to RADOLAN reader
* MIN: enhance RADOLAN header tests

ENH: apply changes to meet GDAL RFC46 https://trac.osgeo.org/gdal/wiki/rfc46_gdal_ogr_unification (#150)

FIX: fix coverage for notebooks (#152)

MAINT: replace `runipy` workflow by `execute`-API workflow (#147)

* MAINT: replace `runipy` workflow by `execute`-API workflow
* MIN: specify kernel
* MIN: extend notebook-timeout, use io.open
* MIN: run notebooks inside wradlib source folder
* ENH: implement coverage handling into testrunner.py

MAINT: post-release 0.10.0 maintenance

- increase version number
- set ISRELEASED=False

MAINT: bump release number

bump release number to 0.10.0, set `ISRELEASED=True`

Release 0.10.0 (#144)

* FIX: add subprocess-switch in testrunner.py
* MIN: update release notes

ENH: added option to read rainbow files from file handel (#140)

ENH: added option to read rainbow files from file handle

ENH: Raster handling (#137)

FIX: add subprocess-switch in testrunner.py (#142)

* FIX: add subprocess-switch in testrunner.py

closes #141

Merge pull request #139 from kmuehlbauer/testrunner-fixup

WIP: adapt wradlib testing to use subprocesses

FIX: exit `run_tests.sh` with `exit_status` [ci skip]

FIX: adapt wradlib testing to use subprocesses, amke necessary changes to xvfb and coverage

FIX: skip py3k tests in py2.7

MAINT: change coverage badge [skip ci]

Add Gitter badge (#134)

ENH: add contour, contourf, cg options to `plot_ppi` and `plot_rhi` (#130)

* ENH: add contour, contourf and overplot options to `vis.plot_rhi` and `vis.plot_ppi`, merge `vis.plot_cg_ppi` and `vis.plot_cg_rhi` into `vis.plot_ppi` and `vis.plot_rhi`, deprecate `vis.plot_cg_ppi` and `vis.plot_cg_rhi`, adapt notebooks and tests...

MAINT: add Codecov (#133)

Update .travis.yml

Update README.md