cache revision number in catalog manager
simplified repository version handling
Merge pull request #105 from reneme/migration

Simplification of Repository Migrations

Currently we only need to migrate repositories created with a version lower than 2.1.7
i.e. repositories created by versions 2.1.7, 2.1.8 and 2.1.9 are compatible and do not need any migration step.
first version of a file system snapshot glue buffer (work in progress)
Merge branch 'master' of github.com:cvmfs/cvmfs
glue buffer (work in progress)
fixed handling of -n option in mount helper
glue buffer helps to avoid ENOENT during catalog reloads
use gluebuffer only in drainout / maintenance mode
minor improvements
adjusted cvmfs-auto-setup to new client
added cwd buffer (work in progress)
FIX: under SLC5 we do not add the SELinux context to /etc/fstab since AUFS does not handle this correctly in this version of the kernel -.-
fixed race between catalog manager and cwd buffer
MINOR HACK: try out if the mount, remount, unmount cycle works as expected
Merge pull request #107 from reneme/fix_slc5_repo_create

FIX: Repo Creation under SLC5

SLC5 has SELinux enabled but is very permissive. Therefore we do not need to add a context=... argument to /etc/fstab. Additionally the aufs version for the SLC5 kernel does not handle this parameter correctly, and fails to mount.
fix credential switch on os
Merge branch 'master' of github.com:cvmfs/cvmfs

merge
Merge branch 'master' of github.com:cvmfs/cvmfs
fix credential switch on os x and not break it on linux