Cleanup and update endpoints

[laander]

Motivation

New endpoints added:

// Resources
timekit.getResources();
timekit.getResource(data);
timekit.createResource(data);
timekit.updateResource(data);
timekit.resetResourcePassword(data);
timekit.getResourceTimezone(data);

Endpoints changed:

// Now calls [GET] /app instead of [GET] /apps/:slug
timekit.getApp()

Endpoints being deprecated (but still supported for BC):

// Users
timekit.createUser(data)
timekit.getUserInfo()
timekit.updateUser(data)
timekit.resetUserPassword(data)
timekit.getUserTimezone(data)

// Filter collections
timekit.createFindTimeFilterCollection(data)
timekit.getFindTimeFilterCollections()
timekit.updateFindTimeFilterCollection(data)

I'm also restructuring the internals a bit to split it up into multiple files for better overview.

Side-effects/other

Updated link to API reference in Readme

Tests

Updated tests to reflect the new endpoints.

Who should review it

@vistik

[vistik]

🎱