* Add mkdirs()
* Create the output directory if it does not exist
* Use the basename of the input path(s) to create the output path(s)
* Verify the program received enough input files to proceed

* Remove redundant argument parsing code for "-c"
* Add usage function
* Add --help argument
* Consolidate splitting and combining into a single loop
* Add allocation error checking
* Move "Writing:" to the bottom of the output
* Add "Map:" to the output

* map file only records the basename of the file