fig2plotly fixes: fileopt default to new unless a filename is specified (then set to 'overwrite'). If a plot title is specified, uses the title of the plot as a filename but does not overwrite plot (appends number to end of name).
Merge branch 'master' of https://github.com/plotly/MATLAB-api
fixed annotation/title
Merge pull request #18 from plotly/fig2plotly_fixes

fig2plotly fileopt fixes