Enhancements To Slide Footers

[MartinPacker]

Two ideas:

• Make special values - such as <presTitle> - case insensitive.
• Resolve any escaped characters.

Latter might be seen as a bugfix.

[MartinPacker]

Coded, tested, and pushed.

[Adichapati]

I can take this—I'll work on making footer placeholder tags case-insensitive and on resolving escaped characters in footer text. Will submit a PR shortly.

[MartinPacker]

Actually I've already done this and - I think - pushed the code and documentation.

But thanks for offering.