Use of relative paths

The current codebase is a pain to maintain because of the number of ../ in imports:

import {regexp} from '../../../../../../../data/acceptFileTypes';
import {RepositoryFile} from '../../../../../../../model/repositoryFile.model';
import {uploadRepositoryFileRequest, deleteRepositoryFileRequest} from '../../../../../../../actions/repositoryFile';

Reconfigure webpack so that imports can be resolved from source "root" directory (now called /assets):

import {regexp} from 'data/acceptFileTypes';
import {RepositoryFile} from 'model/repositoryFile.model';
import {uploadRepositoryFileRequest, deleteRepositoryFileRequest} from 'actions/repositoryFile';