Fix minor ambiguities with JS terms, grammar, errors
Fix minor ambiguities with JS terms, grammar, errors

- updated text were term "module" was used to refer to directories - ensure "feature module" (directory) is differentiated with "module" (.ts, .js, etc. files)
- fixed up some minor grammatical issues
- updated text which incorrectly explained use of prettier
WorldBrain/WebMemex,WorldBrain/WebMemex