Update ru_RU translation for version 1.1
Merge pull request #140 from dvoryanchikov/upstream

Update ru_RU translation for version 1.1
rename term SMS to message
more term renaming, SMS to messagex
MAJOR: add core_call_hook(), utilizing debug_backtrace() to replace the way functions call hooking plugin's functions
get version of php and define how to use debug_backtrace() on core_call_hook()
fix merge conflict