wrong python file name on README

[he1l0world]

"You'll need python version 3.5 or greater, run pip3 install -r requirements.txt to install the requirements, and run python3 langserver-python.py --mode=tcp --addr=2087 to start a local languager server listening at port 2087."

the "langserver-python.py" should be changed to "coala-langserver.py"

[he1l0world]

Can I do this issue as my newcomer's problem? Thanks.

[gaocegege]

Sure