Increase upper version bounds

The new bounds include the text-1.2, conduit-1.2 and websockets-0.9
releases.  I've tested the chat and latency examples with these
package versions, and both still work.
Compile examples with -threaded.

This fixes the error `registerDelay: requires -threaded`.
Rename latency example executable to 'latency-example'.

'latency' is also a MacOSX/BSD system utility.
Include all needed resources in the latency example with 'Data-files'.
Merge pull request #11 from timjb/master

Update upper bounds