Adding test usage to README

The project can be tested for errors using the command

openmemes --test=1 --module=<module_name>

if all services are to be tested, --module argument is not required For testing a specific service set it to module args. example-

openmemes --test=1 --module=generate

Response - If something fails, expected point of error is also mentioned Example -

Resolve - recommendation.py [ ], means check all part of recommendation.py file
Resolve - meme_generator[start()],formats/format2 means error is expected in start() function of meme_generator and formats/format2

OpenGenus / memes