Changes to thread sleep wait fix
very rough code to extract ipv6 pkt from ipv4

Just want to commit this for posterity in case I want to see my work.
Moved signal to postTask function

After a job is posted to the work queue the main thread is signaled from
ShedBasicP. Still working on it, it seems to still freeze up.

I did a test with just busy wait and things seem to go fine
Enabled waiting on cond variable

es starting
Merge branch 'master' of github.com:bradjc/raspberrypi-cc2520