lightct: Visual light computed tomography

First stable release of lightct package:

• Added test case with 88% coverage
• Continuous integration through Travis CI

Improved functionality:

• Cropping of projections

Visual light tomography python package

Working package that allow for the basic acquisition and processing and reconstruction of sets of projections.

Key features include:

• Automatic method for finding number of images in 360 degrees
• Automatic method for finding and adjusting for centre of rotation
• Associated manual methods
• Radon transform for reconstruction