Enhancement (tinytim.js): Added function capability ( controlled )

[masterbee]

• Created a new variable called allowed which helps build the approved list of functions
• Orchestrated a new pre-processing template.replace(...) to allow for template changes of function based tags before object content interpolation.
  • Any content in function tags that do not meet the criteria of the functions are removed from the template on the fly making it cleaner for the content replacement
• Added third parameters index to returned function to allow for passing of index values when looping through arrays of values and calling the template.
• Basic implementation of @mod, @even, @odd functions
• Template syntax

Modulus ( any digit can be used after @mod )

{{@mod 4}}
.... some markup which will be seen every 4 times ( if index is passed )
{{@endmod}} 

Even

{{@even}}
.... some markup on every even number of the index
{{@endeven}} 

Odd

{{@odd}}
.... some markup on every even number of the index
{{@endodd}} 

Just sharing incase you were interested in incorporating it. Again great work @premasagar on the original function

[masterbee]

@premasagar - just chiming in to see if this Pull Request still interests you? I am doing a bit of housekeeping on the repos I have and wanted to know if it was safe to disregard this P.R since there is no interest.

[premasagar]

@masterbee thanks a lot for this pull request. I like the enhancements. I don't use tim any more, and so I am reluctant to merge in new functionality.

There's no need to delete the PR. It may be useful to someone, and maybe it should be merged, either by me or someone who wants to collaborate ?