removing extraneous extract function for payload
removing old prototypes
http steg should intialize steg mods + bit of clean up
fixing SWF payload header processing
fixing typo
added draft unit test for steh
added draft unit test for steg
Merge branch 'f--file-stegize-swf-js-pdf' of https://github.com/TheTorProject/stegotorus into f--file-stegize-swf-js-pdf

Conflicts:
	src/steg/http_steg_mods/file_steg.cc
Restoring SWF payload generation for testing
Restoring SWF payload generation for testing
fixing minor SWF payload typos
Fixing post compression copy (wrong source)
Merge branch 'f--file-stegize-swf-js-pdf' of https://github.com/TheTorProject/stegotorus into f--file-stegize-swf-js-pdf

Conflicts:
	src/steg/http_steg_mods/file_steg.cc
	src/steg/http_steg_mods/swfSteg.cc
cleaned up payload flags and header handling
SWFSteg back to the original way because the the payloads are actually pre-generated
Rationalized payload header handling suggestions (I think)
Cleaning up vmon's suggestions
max capacity of swf shouldn't be zero at init
debuging swf encode/decofe
Update file_steg.cc

undo sprintf not working for SWF header