Remove reference to Tom's private format setting
Change the list of search paths that is used to find avrdude and others

The order is now as follows (which works out best for me):
	/usr/bin
	/usr/lib
	no /usr !!
	/opt
	/usr/local/bin
	/usr/local/lib
	/usr/local
	~/
	no /home !!
	/etc
If you're no happy about it then you can try to convince me that another
list is better. Notive that this list is only used for "System". For each
tool you can override by selecting "Custom".
Add changelog text about fixed bugs #59, #60, #61
Add a few more sections to exclude from flash .hex (bug #49)
Set Require-Bundle to org.junit

See http://wiki.eclipse.org/Eclipse/Testing/JUnit4_Changes