Updated docs and examples.
Reverted the special handling of @ includes due to maintainablity
problem of hardcoding version numbers in js files and the logic problem
of resolving ambigious notations like jquery@1.8+ to the exact file
path. This also indicates a need for the lazy loader to be integrated
with a package manager.
Added relatedTarget poly for Cu.event.
Various modification on adl.
Removed CopperJS global that was used to keep multiple versions of the
library in an app. Use requirejs or homegrown adl.