[aur-tools] Use data from dsc for retrieving version and sha256sums
[aur-tools] Change variable name
[aur-tools] Use vercmp utility instead of pyalpm for version comparison
[aur-tools] Update PKGBUILD only when there is a new version
[aur-tools] Put updater to main function
[aur-tools] Add pkgbuild_dir argument to main
[aur-tools] Change back cwd after commiting the PKGBUILD
[aur-tools] Remove '-pkg' from script name
Merge branch 'update-lubuntu-artwork'