minor changes
splitting up connection stuff
still splitting; need to fix compile errors for conn_replica
fixed merge conflicts
no block functions... need to fix
merged with master, fixed merge conflicts
Merge branch 'master' into my_tmp
replication compiles---think about reorganizing _check_master_and_do, etc.
preliminary inserts seem to work, but weird freeing of unallocated ptr
added ping times, ordering of hosts thereby
starting read preferences
merged ToStr changes
fixed merge conflicts
setting server for read
restructured helpers for reuse
adding tagsets
Merge branch 'master' into my_tmp
fixed server ordering
Merge branch 'master' into my_tmp
restructuring pointers