Adds initial support for indexing tiles during solr/search builds
Marks parent entity as needing indexing if block changes
Merge remote-tracking branch 'origin/feature/solr-indexing' into develop

* origin/feature/solr-indexing:
  Marks parent entity as needing indexing if block changes
  Adds initial support for indexing tiles during solr/search builds
Merge branch 'develop' into feature/get-off-the-context-train

* develop:
  Marks parent entity as needing indexing if block changes
  Adds initial support for indexing tiles during solr/search builds
Merging tiles indexing
Fixes major bug with checking context during indexing

hook_node_update_index() was creating a new context for every node, even if they
don't need it.
Merge remote-tracking branch 'origin/feature/solr-indexing' into feature/get-off-the-context-train

* origin/feature/solr-indexing:
  Fixes major bug with checking context during indexing

Conflicts:
	tiles.module