added library to do checksums
added UDP packet demo
added commit about checksum
Merge pull request #4 from ehsteve/master

Created new directory for PYAS code added demo code
Added first draft fiducial finder.
Moved aspect system code to PYAS-core, separated camera functions into camera.cpp
matched filter code, cameraless test program
Halfway-working FITS files in compression.cpp, compression.hpp. Demos of saving in PNG.
Changes to the fullDemo program to make it work with AVT image stream
Merged fullDemo versions to include camera stream fixes and frame saving
modified UDPEchoClient2.c to send multiple packets
updated to packetDemo to send many packets
added checksum code
Thread program runs
Imperx files added, install info in camerainstall.txt
Merge branch 'master' of https://github.com/akcramer/SAS into akcramer-master

Conflicts:
	PYAS-core/aspect/fullDemo.cpp
Added Imperx documentation
First cut at Imperx image stream class
First cut at Telemetry Object code
fixed checksum code