Version 2.1 Single-Field and tweaks

To reduce keystrokes, where the dataset contains only one field, we now support single line-feeds between records. For example:

<mt-recordsets hidden>
	<mt-fields id="banana-fields">
		FILENAME
	</mt-fields>

	<mt-records id="bananas" mt-fields="banana-fields">
		bananas-1974958-1665026.png
		592d4adf13867b4948f86b89c2e1768b.png
		Banana.png
		482px-Banana_Bunch_-_2D_art.png
		Banana2.png
		banana_1f34c.png
		banana-microsoft.png
		1f34c.png
	</mt-records>
</mt-recordsets>

Also bug-fixes, and improved comments, variable-names, and function-names.
Improved logic for singlet vs collection views.