PKGBUILD: Add arch checks for linux version
PKGBUILD: Fix LINUX_VERSION variable
PKGBUILD: Improve  checks
build.sh: rewrite help output
build.sh: Add debug and dryrun switches
build.sh: Rewrite update_pkgbuilds
lib.sh: Change echo to plain
repo.sh: Rewrite help output
Update to 0.6.2_3.12.9-2