bcfg2-info: added expirecache command to expire metadata cache
bcfg2-info: fixed expirecache
Packages: added lock to yum cache update
bcfg2-yum-helper: added missing docstring
man/bcfg2.conf: add documentation for fam_blocking option
Merge branch 'doc-fam-blocking' of https://github.com/AlexanderS/bcfg2 into maint

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>

Conflicts:
	man/bcfg2.conf.5
Admin/Init: Add listen_all option

Some of these changes were suggested in github issue #29.

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>
doc: Update ubuntu quickstart guide

This commit fixes #29 along with 1450bd7.

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>
doc: Fix typo

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>
debian: Add south dependency

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>
Admin/Init: Fix default db location

Signed-off-by: Sol Jerome <sol.jerome@gmail.com>
Make the server process always detach, even if started by init

Otherwise startup with systemd in type=forking fails since the daemon
will not fork.
Packages: Added timeout to bcfg2-yum-helper calls

This involved making the Yum backend use Bcfg2.Utils.Executor to call
bcfg2-yum-helper instead of subprocess.Popen directly.  This was
cherry-picked (kinda) from 3d06f311274d6b942ee89d8cdb13b2ecc99af1b0,
so will likely break the maint -> master merge in spectacular ways.
Packages: instantiate Executor before determining path to helper
MultiprocessingCore: Dispatch metadata cache expiration to children

When the broker in a multiprocessing configuration expires its
metadata cache (e.g., when probe data is received), it must dispatch
that expiration call to its children.

This also makes the protocol for communication between the broker and
its children into a real RPC protocol, so we can do even more stuff in
the future.
MultiprocessingCore: Call Debuggable.__init__ on DispatchingCache
MultiprocessingCore: removed unused import
MultiprocessingCore: Fixed return value from set_debug
MultiprocessingCore: rewrote parent-child RPC to be thread-safe (and less powerful)
Cfg: unknown-cfg-files lint check honors FAM ignore list