adding rwmutex for port and link methods
adding RWMutex to switches map
removing extra lines
Merge pull request #13 from vtolstov/master

ofp 1.0 section 5.3.2 OFPT_SET_CONFIG is 12 bytes
minor update
Merge pull request #15 from jonstout/safe

Safe. Adds RWMutexs to map types.
Update README.md
adding files from pacit project
Merge pull request #16 from jonstout/pacit

adding files from pacit project