Fixed bug #5403: "The ProbABEL manual doesn't contain any information on
  how to install ProbABEL" by adding a section on obtaining and installing ProbABEL.

I also started to use the lstlisting LaTeX package to display the commands and their output. This needs to be followed up for the rest of the document.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/genabel@1653 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
- Updated the ProbABEL Changelog with the two latest bug fixes
- Added a line in the INSTALL file mentioning the installation instructions in the manual.


git-svn-id: svn://svn.r-forge.r-project.org/svnroot/genabel@1654 edb9625f-4e0d-4859-8d74-9fd3b1da38cb