WIP: non-functional main template

main.c with non-functional callbacks.  Compiles and runs but returns EROFS on any callback.
Makefile for compiling with the right options.  Also has clean target.
WIP: added fused_pcap option parsing, value validation
move default values to defines
changed all callback function names

matches convention in fuse docs now
WIP: refactor option validation
move source dir and debug into global structure
modify help option so it also shows fuse help
align and update usage text and defaults
capture mount directory in local context
fix noisy fprintf out of debug check
switched path vars from dynamic to static allocation
WIP: initial callbacks to allow file read on mount

by no means finished.. can just barely read a file back.
tweak debug output of filesize option
refactor convert/validate routines for path prefix use

modified the 5 option conversion/validation routes so they can be used
when evaluating path prefixes as well as mount-time options
tweak the way mountPath is created
add pseudocode comments for supporting clusters
cleaned up convertValidateFilesize debug output
make refactored functions static scope
err on validating filesize with non-expected suffixes
WIP: start to flesh out readdir and access callbacks

initial response to readdir and access callbacks.. enough to allow tab completion and listings