Start bokeh server with applications paths

def create_bokeh_server(io_loop, files, argvs, host, port):
    '''Start bokeh server with applications paths'''
    from bokeh.server.server import Server
    from bokeh.command.util import build_single_handler_applications

    # Turn file paths into bokeh apps
    apps = build_single_handler_applications(files, argvs)

    # kwargs lifted from bokeh serve call to Server, with created io_loop
    kwargs = {
        'io_loop':io_loop,
        'generate_session_ids':True,
        'redirect_root':True,
        'use_x_headers':False,
        'secret_key':None,
        'num_procs':1,
        'host': host,
        'sign_sessions':False,
        'develop':False,
        'port':port,
        'use_index':True
    }
    server = Server(apps,**kwargs)

    return server