annalist: Version 0.1.28

This release provides customisable online help, other cosmetic updates, and some bug fixes. The main visible change is in the use of view, list and field comment text to provide online hekp and tooltips when editing or viewing data. This provide some key documentation of user operation details in the user interface itself, rather than in separate documentation files. External documentation is still needed for overview and HOWTO type information, but the aim is that it will not be so critical for finding details - especially in the area of view and field definitions and use. These changes also mean that Annalist collections can contain domain-specific online help for their specific purposes and definitions provided. New functionality in this release is the possibility to use common fields for uploaded, imported and linked resources (e.g. images and audio clips). This is achieved by creating supertypes that subsume the various sources, which can then be referenced and displayed. Release notes: https://github.com/gklyne/annalist/blob/master/documents/release-notes/release-v0.1.m