Sample app fixes#93

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DavidLudwig wants to merge 3 commits intocpp-io2d:masterfrom

DavidLudwig:sample_app_fixes_1

Commits on Sep 23, 2018

bug-fix: 'sprites' sample-app doesn't find input files, if launched via command-line and from a directory other than the one the executable is in
DavidLudwig
committed
bug-fix: 'draw_cpp' sample-app wasn't finding source-image, if launched from a directory other than that which contains the sample's executable
DavidLudwig
committed
draw_cpp: default to showing output in a window; make file-based output be optional, via cmd-line args
DavidLudwig
committed