P1900092 v3: PyCBC Live reference

As mentioned in #30 (closed) and #33 (closed), the correct reference for PyCBC Live is:

Rapid detection of gravitational waves from compact binary mergers with PyCBC Live Alexander H. Nitz (Hannover, Max Planck Inst. Grav.), Tito Dal Canton (NASA, Goddard), Derek Davis, Steven Reyes (Syracuse U.). Phys.Rev. D98 (2018) no.2, 024050 DOI: 10.1103/PhysRevD.98.024050 e-Print: arXiv:1805.11174

See the thread in #30 (closed) for other references, if more than one are wanted.