Updated the bittorrent-sync.install file to fix a few bugs and issues.
Changed the post_install() if statement to be correct.
Before it was missing quotes around the grep command, so it was causing an error when evaluated.
Also the comparison operator was set to "!=" when it should have been "==" so as to create a new user when no old one was found.

PKGBUILD file was also updated with new sha256sum.
Merge branch 'master' of github.com:zdevex/bittorrent-sync