Update ShowDemo.psd1 FunctionsToExport for lazy module loading

[derekthecool]

Adding this simple change allows me to not have to run Import-Module before running the awesome functions in this module. Perhaps this would export more that you want to from this module.

Using function names not ending in -Demo would not be exported

[derekthecool]

Seriously thank you, thank you for blessing the world with these awesome modules!