added methods to set min&max of a slider
added getter for min&max of ofxSlider
changed addons to a c project for eclipse
added ignored .cproject for eclipse
Merge pull request #2936 from fx-lange/feature-addonsEclipse

changed oF/addons to a C project for eclipse
Merge pull request #2819 from fx-lange/feature-ofxslider

feature request: added methods to set min&max of a slider
Merge branch 'master' of https://github.com/danoli3/openFrameworks