Added OpenCV as another dependency
Added a method to add a matrix to the HDF5 container file
Removed old code for adding images
Added some more dependencies to the PKGBUILD script for arch linux
Changed the behaviour of the user wants to create the root element
Started to implement the first tests for the addMatrix function
Changed the default attribute for an added matrix to be the OpenCV matrix type
Started to implement a method to access all attributes of an object