Added Arch linux support. Old curl ensure ssl fix. Removed do_python

Resolves #20 and resolves #21. 
For Arch linux:
Note that when supplying version, it only ensures that at least that version or later is installed. Arch linux doesn't support old packages.
For FreeBSD:
I don't know how to install a specific version (yet).. would like to hear suggestions!
Good plan, should keep following redirects! :+1: