Merge branch 'master' into lua-types

.travis.yml

client/tarantool/CMakeLists.txt

client/tarantool/tc.c

client/tarantool/tc_admin.c

client/tarantool/tc_buf.c

client/tarantool/tc_buf.h

client/tarantool/tc_cli.c

client/tarantool/tc_opt.c

client/tarantool/tc_opt.h

client/tarantool/tc_print.c

client/tarantool/tc_print.h

client/tarantool/tc_print_snap.c

client/tarantool/tc_print_snap.h

client/tarantool/tc_print_xlog.c

client/tarantool/tc_print_xlog.h

client/tarantool/tc_store.c

cmake/CheckBuiltInFunctionExists.cmake

connector/c/include/tp.h

connector/c/tnt/tnt_buf.c

connector/c/tnt/tnt_tuple.c