add more heuristic to routes patterns

[musketyr]

some of pattern should be simplified if we use some heuristic in transformRouteIntoRegex

https://github.com/gaelyk/gaelyk/blob/master/core/src/main/groovyx/gaelyk/routes/Route.groovy#L109

e.g. before optimalization routes like **.groovy doesn't work at all (or last too long to process), because they were too complicated.

[erdi]

I've just hit this issue while preparing for my GGX talk. The performance of those regular expressions is quite bad and this looks like a high priority issue as most of the requests have to go through routes filter. This should definitelly be fixed before next release. I don't have time to play with it ATM, but this is the first thing on my list for the weekend after GGX.