Adding example using connectionWD, which is present inside <projection> elements, which specifies a connection with weight & delay
Fixes #12
Merge branch 'master' into stp
Remove misplaced parameter from nmdaSynapse.

Also, rearrange element declaration ordering in Synapses.xml to make
the file more compliant to the LEMS schema. There is still an issue
with the use of DerivedParameter, though, which has been recently
removed from the schema, even though it may be reintroduced soon.