Move repolibs release fetch to the last minute.

Instead of fetching the consumers 'release' from candlpin
when we create RepoLib, wait until we need it just before
rendering.

Adds a YumReleaseverSource to pass through the various repolib
functions. The YumReleaseverSource has a .get_expansion() that
expands the macros and caches it.

Add a cache.ReleaseStatusCache used by YumReleaseverSource

ReleaseStatusCache caches the status of the consumers
getRelease call. This lets release fall back to a
cache in disconnected cases, even with full_refresh_on_yum
enabled.

Also add a StatusCache.read_status() that loads the status,
then uses the cache, or falls back to cache if needed.
YumReleaseverSource uses this to cache the getRelease results.

Move all the auth/cert related exceptions to be caught
before network exceptions. Now also catch all
ConnectionException subclasses.
Typo
Add 'list --matches' example to man page.

Also add some vertical whitespace around examples.
1142918: Fixed proxy config button labels

- The "cancel" button on the proxy configuration window no longer
  has the same accessibility label as the "test connection" button.
Merge pull request #1090 from candlepin/crog/1132981

1132981: Fixed exit code when registering system with no products
1159348: Improved list error output when using list criteria

- Specifying a service level or filter expression that filters all
  subscriptions or products will now print the criteria used in the
  query.
Merge pull request #1088 from candlepin/alikins/man_page_misc

Add 'list --matches' example to man page.
1122530: Removed/updated more obsoleted documentation, dates and versions

- Additionally, some minor grammar corrections have been made.
Merge pull request #1087 from candlepin/bkearney/typo

Typo
Automatic commit of package [subscription-manager] release [1.13.11-1].
Merge pull request #1089 from candlepin/crog/1142918

1142918: Fixed proxy config button labels
Merge pull request #1079 from candlepin/alikins/yum_release

Move repolibs release fetch to the last minute.
Merge pull request #1091 from candlepin/crog/1122530

1122530: Removed/updated more obsoleted documentation, dates and versions
Merge pull request #1092 from candlepin/crog/1159348

1159348: Improved list error output when using list criteria
Latest strings from zanata.
Automatic commit of package [subscription-manager] release [1.13.12-1].
1070585: Changed button label from "Ok" to "Save"