(mega-commit) introduce new Browsers API for opening an external web browser and installing certificates into it; current implementation is for Linux and Mac OS X and needs to be finished
branches/nl.nikhef.jgridstart-flyingsaucer/nl.nikhef.jgridstart/src/nl/nikhef/jgridstart/CertificatePair.java
branches/nl.nikhef.jgridstart-flyingsaucer/nl.nikhef.jgridstart/src/nl/nikhef/jgridstart/install/exception/