ops.js: OPS.js 4.0.0 for Open PHACTS 1.4 API

Ian Dunlop, Egon Willighagen, Elblood, Andrawaag & PANDORINO
Javascript library for requesting information from the Open PHACTS API and parsing responses. Version 4.0.0 is compatible with the 1.4 API (and should be backwards compatible with 1.3). Includes Disease API calls and compound/target batch. New release created due to change of response from pathways by target.