only support redis list
RedisListInput worked with "RPOP"
RedisListOutput worked with "LPUSH"
edit the cmake/plugin_loader.cmake file and add
add_external_plugin(git https://github.com/liuyangc3/heka-redis-plugin.git master)
or (if you don't need all the plugins)
add_external_plugin(git https://github.com/liuyangc3/heka-redis-plugin.git master input)