Remove redundant call to openFile.

Actually, why not just use readFile, both here and in catch-mask.hs?
Merge pull request #2 from kosmikus/geturls

minor fixes to the geturls samples
Merge pull request #3 from kosmikus/catch-mask

Remove redundant call to openFile.
fix warning; avoid using spawnP
remove euler35 (Project Euler's license doesn't allow commercial use)
Add a pipeline example based on RSA encryption
use the Trace scheduler (gives slightly better results)
add rsa-pipeline to the .cabal file
fixes
overhaul the parinfer code
Remove redundant imports.