Update osx build and packaging scripts
Add pango env vars to osx package script
Fix scalable icon install dir
Fix #2290 : Extractor: Dotted filenames being rejected
Update Extractor plugin description, version and modify log levels
Change to using pop_alerts to get batches of alerts and save calls

Requires libtorrent >=0.16.7
Update DEPENDS
raise lt version
remove libtorrent build code