(3.12) Fixed some exportgraphics/copygraphics compatibility messages;…

… Added -silent option to suppress non-critical messages; Reduced promo message display rate to once a week; Added progress messages during export_fig('-update')

(3.11) Fixed issue altmany#317 (bug when exporting figure with non-pi…

…xels units); potential solve also of issue altmany#303 (size change upon export)

(3.10) Fixed issues altmany#313,314 (figure position changes if units…

… ~= pixels);

Display multiple versions change-log, if relevant;
Fixed issue altmany#312 (PNG: only use alpha channel if -transparent was requested)

(3.09) Fixed issue altmany#310 (hopefully): bug with tiny image on HG…

…1; fixed title cropping bug

(3.07) Fixed issue altmany#307 (bug in padding of bitmap images); fix…

…ed axes transparency in -clipboard:emf with -transparent

(3.06) * Significantly improved performance (speed) and fidelity of b…

…itmap images;

       * return alpha matrix for bitmap images;
       * fixed -update bug (issue altmany#302);
       * added EMF output;
       * added -clipboard formats (image,bitmap,emf,pdf);
       * added hints for exportgraphics/copygraphics usage in certain use-cases;
       * added description of new version features in the update message;
       * fixed issue altmany#306 (yyaxis cropping);
       * fixed EPS/PDF auto-cropping with -transparent

(3.05) Fix the generated SVG file, based on Cris Luengo's SVG_FIX_VIE…

…WBOX; don't generate PNG when only SVG is requested

(3.04) Workaround for issue altmany#15; alert if ghostscript file not…

… found on Matlab path

(3.03) Suggest to upload problematic EPS file in case of a Ghostscrip…

…t error in eps2pdf (& don't delete this file)

Clarified/fixed error messages; added error IDs; easier use of -updat…

…e option; various other small fixes