169 format titlepage
Added variable to choose 16:9 format in main.tex. beamerthemeACON.sty chooses between 16:9 for \aspectratio=169 and 16:10 else.
Added variable to choose 16:9 format in main.tex. beamerthemeACON.sty chooses between 16:9 for \aspectratio=169 and 16:10 else.