Replace "absolut" require paths with relative ones

[alexgutjahr]

At the moment all require paths are absolute to the base URL '/src'. If the build system allows it they should be replaced with relative URLs to the current module which would greatly improve readability. Example:

// src/modules/reportr/reportrModule.js
define(['angular',
    'modules/reportr/revenueController',
    'modules/reportr/vacationController',
...
// can be replaced with
define(['angular',
    './revenueController',
    './vacationController',
...