You can download the 0.1 of BIXTEP here (Release Notes).

Development version
If you want to download the latest development version (not recommended for productive use) from the Subversion repository, enter the following command in your terminal:
svn co http://svn2.assembla.com/svn/bixtep/0.2 bixtep

Dependencies
In order to use BIXTEP, you need to download and install the XMLStarlet package. The easiest way to install it is using your distribution's package management software.