cleaned-up gpio external dependencies and supporting build script. made disis_gpio external into a comprehensive object for all things gpio, including pwm (both hardware and software) with sarcduino-like formatting and verbose output. The external requires sudo due to required access to /dev/mem and /sys/class/gpio

*forced array graphs to keep GOP/hidetext under all circumstances (later update properties window so that the GUI reflects this rather than printing info in the console)

*removed unnecessary logic for keeping carriage returns to avoid having an empty line at the top of the console after clearing console

*forced hidetext on all gop arrays to make its resizing sane. Later update properties to reflect lack of this option.

*fixed segfault when trying to create an object inside an array GOP due to incorrect check whether the object is an array in shouldvis function that is being called as part of gobj_vis to optimize (re)drawing

*made GOP aware of minimum size when having an array embedded inside it

added ability for comments to be navigated by rows (using up/down), as opposed to home/end which takes you to the beginning/end, or ctrl+left/right which takes you to the next space

backported comment resize marker, updated it to support pd-l2ork and selection colors, added fix to the resizable objects to support abstractions and subcanvases.

*added new externals for raspberry pi (disis_gpio for digital I/O and disis_spi for analog I/O using mcp3008 A/D converter). Provided preliminary help files. PWM on gpio needs to be tested further. So does the build script. TODO: add this to the installer, including 4755 chown_gpio script.

added forward mess patch by Jonathan Wilkes that enhances in-patch interaction (think: prancing ponies patch demo)

added updated help files for pdinfo, classinfo, and canvasinfo (by Jonathan Wilkes), merged patch by Jonathan Wilkes for the search-plugin.tcl with additional enhancements for tab/focus.

reapplied Albert Graef's patch due to wrong patch being applied for the delayed unbind. Still have to work on ensuring that there are no memory leaks in unique cases where an object unbinds a different bindlist when receiving a message to do so on another (faust being an example of this).

initial commit of the custom raspberry_pi externals supporting read/write from digital pins, analog pins (using shield with a mcp3008 A/D converter), and netsend~/netreceive~ optimized for rpi (net objects being copies of work done in the core pd)

fixed cursor inconsistently failing to reflect topmost clickable object while ignoring non-clickable objects that are above topmost clickable object, both on main canvas and inside gop objects.