Batch Calculator v0.1.1

Batch calculator allows you to:

Switched completely to ObjectListView for all the list-type display widgets, in the main window as well as in all the relevant dialogs. As a consequence all the dependencies on ListCtrl's mixins were dropped.
Added a function to calculate the zeolite composition (molar ratios) from the masses of the reactants.
Reduced the number of lists displayed in the main window, now there are two panels, input and output, and each has two lists.
Added binaries for Windows and Mac OSX for easier installation.
Small adjustments to the database.