medium: ui_resource: Set probe interval 0 if not set (bnc#905050)
doc: Document probe op in resource trace (bnc#905050)
high: config: Fix path to system-wide crm.conf (#67)

The path for the system-wide crm.conf was incorrect.

Fixes #67.
medium: config: Fall back to /etc/crm/crmsh.conf (#67)

Backwards compatibility with users of <=2.1.1 who figured out that using /etc/crm/crmsh.conf would work.
low: cliformat: Colorize id: as identifier (boo#905338)
medium: cibconfig: Don't bump epoch if stripping version
medium: ui_context: Lazily import readline

Avoid problems with readline adding garbage to output
by only importing it when necessary.

See: https://bugs.gentoo.org/show_bug.cgi?id=246091
medium: config: Add core.ignore_missing_metadata (#68) (boo#905910)

Add option to ignore missing metadata for resources, which can
be useful for clusters with remote resources. These clusters
behave like asymmetric clusters but are not necessarily configured as
such.