Feature/collection citation

[chuanlin2018]

This checkin modified citation text to use facilitators when there is no author in the author list for collections. If no facilitator, point of contact will be used.

This version is using the fake backend to get taxonomy data for the taxonomy tree view.

To test, turn on the fake backend in app.module.ts and run it locally.

URL:
Forensics: http://localhost:4200/lps/pdr0-0001
CHIPS Metrology: http://localhost:4200/lps/pdr0-0002
NIST: http://localhost:4200/lps/5887178FE62C46F8E0531A57068103631858

To change test data, modify test1(Forensics) or test2(CHIPS Metrology) in environments.ts.

To change taxonomy tree view sample data:
Config:
Collection config file: assets/site-constants/collections.json
Sample data: asset/sample-data/semiconductor-realdata.json
Sample data:
To change collection sample data, adjust line 19 in app/_helpers/fakeBackendInterceptor.ts:
const sampleCollection: any = require('../../assets/sample-data/semiconductor-realdata.json');