v0.1.6, 15-Oct-2013 -- Initial release
v0.1.7, 15-Oct-2013 -- Update documentation
v0.1.8, 15-Oct-2013 -- Update documentation
v0.1.9, 16-Oct-2013 -- Modify wxpython
v0.1.10, 16-Oct-2013 -- Eliminate wxpython
v0.1.11, 20-Oct-2013 -- Overhaules quat_funcs
v0.1.12, 23-Oct-2013 -- renamed "quat_funcs" to "quat"
v0.2.0, 27-Oct-2013 -- documentation and testing much improved
v0.2.1, 28-Oct-2013 -- reset current dir in __init__.py
v0.2.2, 28-Oct-2013 -- indentation mistake in fitLine corrected
v0.2.3, 29-Oct-2013 -- changed from wxPython to PyQt4
v0.3.1, 29-Oct-2013 -- changed directory structure, added docu
v0.3.2, 29-Oct-2013 -- include HTML-documentation
v0.3.3, 29-Oct-2013 -- include tests, correct fit_sin
v0.3.4, 03-Nov-2013 -- include more tests, correct fit_line, correct docu regress
v0.3.5, 03-Nov-2013 -- adjust "regress" so that it is compatible with the
                        corresponding MATLAB command
v0.3.6, 06-Nov-2013 -- model "vector" included
v0.3.7, 06-Nov-2013 -- Compatible with Python 3!
v0.3.8, 06-Nov-2013 -- auto-import for "vector" was missing - fixed
v0.4.0, 26-Nov-2013 -- added functions for
                        - analyzing video-based marker recordings
                        - calculate and show mean and SE of time series
                        - a data viewer
                        - corrvis
                       as well as formulas and details to the documentation
v0.4.1, 27-Nov-2013 -- License for code and documentation changed to BSD 2-clause
v0.5.0, 04-Dec-2013 -- Add "kinematics_from_markers", and group
                        kinematics-related files into a module "kinematics.py"
v0.5.1, 09-Jan-2014 -- Add function for
                        - quickest rotation of one vector into another
                        - analysing IMU-signals
                       Move "rotate_vector" from "quat" into "vector"
v0.5.2, 17-Jan-2014 -- Corrected error in "reconstruct_movement"
