Merge branch 'master' into refactoring-box-tuple

.gitignore

CMakeLists.txt

cfg/prscfg.c

cfg/tarantool_box_cfg.h

client/CMakeLists.txt

connector/c/CMakeLists.txt

connector/c/Doxyfile

connector/c/include/tnt.h

connector/c/include/tnt_buf.h

connector/c/include/tnt_delete.h

connector/c/include/tnt_error.h

connector/c/include/tnt_insert.h

connector/c/include/tnt_io.h

connector/c/include/tnt_leb128.h

connector/c/include/tnt_main.h

connector/c/include/tnt_mem.h

connector/c/include/tnt_memcache.h

connector/c/include/tnt_memcache_val.h

connector/c/include/tnt_opt.h

connector/c/include/tnt_ping.h