fix rename arg order

fix text busy error with copy to the same partition followed by a rename

replace rename() with copy

Merge pull request tj#8 from StarpTech/feature/fix_bin_move_across_disks

fix bin move across disks

add quick support for specifying a version

add quick support for specifying a version

change LatestReleases() to return a request.Error

remove /releases from Apex store

add Store interface, Github and Apex implementations

change to install from tarballs. Closes tj#4