Pkg: add simplified BSD license option, wrap license text at 70.
git ignores: tighten these up as they're a bit too inclusive.
Pkg.scaffold(dir=<dir>): allow scaffolding with any name elsewhere.

This allows creation of new package scaffolding using the same code
that won't have any interaction with the existing registered or
installed packages as requested by @johnmyleswhite.
Merge branch 'master' of github.com:JuliaLang/julia
Merge branch 'master' of github.com:JuliaLang/julia