This is pretty straight-forward job.
Just a clarification needed:
you need a script which will scrap and give you library of all Skills from Linked-in,
or you need just the library(Skills)?
i think you are asking for 1st one.
i can develop this in either PHP or Python (both run only on web)
or as a C# application, which can run on desktop.
Let me know your requirement, my bid for this job is $177CAD
Regards,
- Vishal