clearing flow stats when a switch disconnects
also found a small problem when doing a reload and having a switch not connected
Merge branch 'ISSUE=8828-flow-stats-cache-not-cleared-on-disconnect' into 1.0.2-dev
adding .DS_Store
Merge remote-tracking branch 'upstream/1.0.2-dev' into 1.0.2-dev

Conflicts:
	src/main/java/edu/iu/grnoc/flowspace_firewall/FlowSpaceFirewall.java
Merge pull request #46 from ajragusa/1.0.2-dev

a few more fixes for issues found during at scale tests