Fixed compatibility to 1.9.2+
input_event_to_byte_string fixed to use rb_time_timeval call
add a macro to specific the ruby minor version
Merge branch 'master' of github.com:zhum/revdev into support_ruby19
add tests for ruby1.9
add micro definition to support both ruby 1.8 and 1.9
fix to work with ruby 1.9