Merge pull request #1 from spreeker/master

first client attempt..
add test requirements
add client auto import, todo functions
some functions working, client error handling
basic server stuff working
bogus server for testing
set no callback, just log the event
ignore core dump
implement all server functions
complete server is working, except callback
update doc and setup
add server script
add travis build file
add link to travis
correct travis file location
update before package install
make it a real script
working on read & write area
run snap7 server
fix 2.6 and 3.3 compatibility