Merge pull request raysect#369 from raysect/development

Hotfix before release 0.7.0

Merge pull request raysect#344 from raysect/development

Release 0.6.1

Merge pull request raysect#322 from raysect/development

Release v0.6.0

Merge pull request raysect#288 from raysect/development

Release v0.5.6

Merge pull request raysect#266 from raysect/development

Made cython a dependency and removed c files from the distribution.

Merge pull request raysect#245 from raysect/development

Release 0.5.4

Merge pull request raysect#238 from raysect/development

Release v0.5.3

Updated minimum requirements.

Fixed bug in setup.py.

Merge remote-tracking branch 'origin/master' into development