* added initial support for gui-less simulations
* removed certain static variables for robustness
* added support for standard gui plugins (startup)
* added quick-load menu option
* separated plugins from plugin visualizers
* user properties saved to user home (.cooja.user.properties) instead of to current working directory
* added config value "standard user platforms"
* class loader bug fix
- save plugin information (experimental)
- bug fix: windows not being deselected correctly
- include contiki system symbols option (no need for the missing elf-loader files)
*added user platform history in platform configs
*throwing 'include user platform directories' flags to compiler
*fixed bug in platform config viewer
*removed old custom class loader