fix #172: Use border styles for the iemgui label anchors, and the gop_rectangle color for the gop move anchor

change from checking OS to checking nw version for the zoom_kludge (This way the OSX 10.8 binary can use lts 0.14.7 and get the kludge)

stop using "x" for sending iemgui colors-- while it has a precision formatter, it doesn't have a maximum size formatter (and it can't because 64-bit archs need the larger values)

cherry-pick Albert Gräf's branch: Comment out a bunch of debugging statements which add a lot of noise to the console.

- ret.split(";") should be ret.split(problem_chars[i])
- remove the function from dialog_canvas.html where it isn't needed

This automatically picks the right zoom level to make the patch fill the window as much as possible. Also fixes a missing call to pdgui.gui_canvas_get_scroll in the m.view.zoomreset menu command which caused the viewport not to be updated properly after resetting the zoom level in canvas windows.

This disables the "paste from clipboard" functionality for now, which is conflated with the ordinary paste at present. Combining the two isn't a good idea anyway due to various reasons, cf. jwilkes/purr-data#156.

Switch to the actual system locale at startup if we have translations for it. Otherwise fall back to the default 'en' locale.

first draft for opening files from command line or graphical file manager in the current Purr Data instance

With the latest nw.js versions (0.17.x and later), this attribute prevents the
anti-aliasing of patch cords, selection rectangle etc., which looks really
bad. Commenting out the corresponding lines in pdgui.js reenables the
anti-aliasing.