Fixed spinner issue. Related to using an integer array instead of a string array to create the resource.

Further attempts to fix spinner. Narrowed error down to null pointer at setAdapter line either spinner or adapter is null but on debug inspection this doesn't appear to be the case.

Mid work commit with some sensors possibly implemented and notifications completed. Both are as yet untested.

Initial commit - some designs from pre-Christmas in addition to newly created java files. See logbook 9/1/18