Feature request: Swig Range function

[alex-e-leon]

Pretty self explanatory: Add lo-dash's range function as a swig function. I found it useful when building out pagination for example:
{{ range(maxNumPages) }}
but it's generally useful any time a number is provided that you may want to iterate over in the template.

[alex-e-leon]

@LtSquigs Any updates?

Link to the PR for this issue #39