Extra utility template functions that should be in the tool

[patrickdappollonio]

I'm compiling a list of utility functions that should be in the tool but they aren't there yet, like:

• unixnano: returns the Unix timestamp (in this case, it may be worth to keep the unix nano when the application executes, and reuse the same unix timestamp on all unixnano calls, so a few calls to unixnano separated by, say, a second, won't return two outputs)
• numbetween x y: to generate a number between x and y
• b64encode and b64decode: to encode and decode strings into base64
• queryescape and queryunescape: to encode and decode URL query params

Also consider implementing icrowley/fake

[patrickdappollonio]

Closing as a few months ago there were a few new functions added.