Now you can delete tap interfaces. 
The layout file is no more saved in the current directory, but in the
home directory
Updated .gitignore to ignore temp vim files and build.sbt.orig.
Re-enabled alert for OVS not installed/not running.
Added detection of VLAN mode for OVS port.
Added more type infos for lists of drawn elements.
--orglayout command line parameter  instead of -orglayout
SwingActions now use "execute" function
Updated the README to reflect the changes.