Merge pull request #2 from kalwalt/master

Modifications to works in linux OS
Ignoring more Xcode stuff
Rudimentary threading support (uploads only for now\!)
restore testApp
Merge remote-tracking branch 'upstream/master'

Conflicts:
	ofxFlickr_example_upload/src/testApp.cpp
clean testApp
adding info in readme.md and remove old code in testApp

Signed-off-by: walter <info@kalwaltart.it>