Python: added set_keepalive method to elliptics.Node. Aded merge_indexes and recover_index to elliptics.Session
Recovery: replaced merging index shards by calling elliptics.Session.merge_indexes.
Docs: fixed typo.
Core: added checking size of object before reading ext header. Made reading ext header in blob_read and blob_file_info in same way.
Merge pull request #484 from shaitan/master

Core: Added unmapping IPv4 from mapped IPv6 address (Master)
v2.25.4.18
submodule: removed react, started to use git:// instead of http://
Merge branch 'master' of github.com:reverbrain/elliptics