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"
v0.5.3, 26-Jan-2014 -- Eliminated PyQt, replaced it with tkinter
v0.5.4, 26-Jan-2014 -- Corrected small mistake in default arguments
v0.6.0, 15-Mar-2014 -- module "sounds" added
v0.6.1, 15-Mar-2014 -- reference mistake in "sounds" fixed
v0.6.2, 18-Mar-2014 -- update for Linux
v0.6.3, 19-Mar-2014 -- update for Linux/Mac
v0.6.4, 19-Mar-2014 -- Docu added
v0.6.5, 20-Mar-2014 -- Fixed bug for manually generated data
v0.6.6, 20-Mar-2014 -- Fixed bug with import of "kinematics" module
v0.7.0, 18-Apr-2014 -- Added "progressbar" to ui
v0.7.1, 17-May-2014 -- Errors in kinematics.reconstruct_movement fixed
v0.7.2, 17-July-2014 -- after using the Tk-window manager, close it properly
v0.7.3, 01-Oct-2014 -- Listbox added to "ui"
v0.8.0, 19-Oct-2014 -- "viewer" added, "ui.viewer" eliminated
v0.8.1, 20-Oct-2014 -- make ui.py more stable for Python 3.4
v0.8.2, 20-Oct-2014 -- make viewer.py more stable for Python 3.4
v0.8.3, 22-Oct-2014 -- viewer fixed, deprecation warning for savgol added
v0.8.4, 13-Nov-2014 -- Ellipse fit added
v0.8.5, 21-Nov-2014 -- Quaternion class added
v0.8.6, 21-Nov-2014 -- bugfix, and tests added
v0.8.7, 22-Nov-2014 -- Quaterion class extended, to include slicing, export, etc.
v0.9.0, 24-Nov-2014 -- Quaternion class now contains imports and exports to
'rotmat', 'Fick', 'Helmholtz', 'Euler'
