Save the state of codemirror
Typeahead should not overflow
Made change_tracking_map_t save by wrapping access to the changed key set into a subscription
Removed debug message, because it was often triggered incorrectly.
Typo
Restructured change_tracking_map_t safety checks
Removed unused include
Merge branch 'next' into daniel_2702
Made secondary_index_t be versioned.
Initialized reql version fields in the secondary_index_t default constructor.
Added a TODO comment.
Added a cluster_version_t parameter to the env_t, but did not pass correct values everywhere.
Removed wrong RSI comment.
Made secondary index env_ts actually receive the appropriate reql version.
Disallowed opaque_definition_out from being NULL in acquire_sindex_superblock_for_read.
Dropped pointless reql version parameter of non-sindex env_t constructor.
Turned an RSI into a TODO.
Improved the commenting around opaque_definition_t.
Removed the unpopular opaque_definition_t typedef.
Initialized secondary_index_t reql version fields properly in store_t::add_sindex.