Made tests for morris groups
Added module for generating morris samples with groups
Added coverage config file
Improved python 3 compatibility
Added tests for Sobol_G
Changed py3 error '01' in np.array
Changed py3 error '-01' in np.array
Corrected python 3 error
Updated travis file to omit tests in coverage reports
Amended coverage to exclude tests folder
Removed omit statement from Travis file (in coveralls config file)
Amended typos in procedure help
Integrated all morris procedures into one sample class
Updated tests to check for range errors
Range checks, typos sorted
Test and check for G as matrix
Commented out scaling (now in class)
Argument checks

- Added more checks for value of optimal trajectories required argument
- Used different letters for the optional arguments (missing a dash for
-opt made the value for -output be the end of the line
Removed unused tests and cleaned up imports
Added description text to Morris class