groundwork on getting an age/depth curve fully set up
interpolations work; can't yet save
included some general bug fixes and also addressing the issue of allowing an 'all' depth in all cores. Need to work out a way to save the interpolation function that isn't going to be a serious pain long-term.
Fix hilarious __iter__ bug, allow saving, fix saving bug
Merge branch 'interpolations'
add stub for BACON component