Add read/write file cli parameters (#882)
Add read/write file cli parameters (#882)

* Add some more command line options

* Use nomnom for proper option parsing

* Handle macros

xymostech/KaTeX,kwangkim/KaTeX,kwangkim/KaTeX,xymostech/KaTeX,kwangkim/KaTeX,kwangkim/KaTeX,Khan/KaTeX,xymostech/KaTeX,xymostech/KaTeX,xymostech/KaTeX,kwangkim/KaTeX,Khan/KaTeX,Khan/KaTeX