Changes made during port

A list of changes made when porting the original tex and styles to the jtex template format.

Based template.tex on a copy of example.tex shipped in the original
Removed package includes that are already listed in jtex base packages
Changed fontenc loading to use \PassOptionsToPackage for the T1 option
Inserted template blocks and vars for
- Title
- Date (Optional)
- Authors - replaced placeholder content with Author, Affiliation blocks
Using doc.title as \shorttitle
Updated pdf metadata to pull title and author from LaTeX and subject and keywords from doc.description and doc.tags
Added abstract as tagged block
Added keywords from doc.tags
Removed the non-bibtex option for inline references and pointed bibliography to main.bib
Added arxiv.sty to root folder
created content.tex with main content from example.tex
removed default fonts setting to allow compilation from xelatex and loaded lmodern
added supported user defined options

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