implemented iemgui "pos" method

*made startmotion more user-friendly by hiding iemgui's handles after initial creation until motion is complete. LATER get rid of this because it is likely to be seen as an interim hack due to determinacy issues between the gui and core engine.

*cleaned nlet highlighting code (removed redundant call)
*updated TODO
*adjusted startmotion offset (may need further tweaking)

*added ability to have spaces in iemgui properties dialog

change type of scalehandle_new and h_master. Document some structs in g_all_guis.h and change some field sizes.

*cosmetic fixes to g_canvas.c

remove canvas/glist arg in a bunch of recently added iemgui functions, and introduce iemgui_draw_move & iemgui_draw_config

*improved g_all_guis.c and detection/drawing of handles

*fixed remaining g_number.c regressions. Now need to match this with the rest of the iemgui objects.

*fixed handle behavior on iemguis (current implementation is not equipped to deal with config kind of actions, and it does not have to)
*streamlined GOP handles since now draw_select deals with explicit delete before redraw

*fixed send and receive functions so that they properly update number2

*added selected tag to scalehandles since they should only appear when things are selected (or as is the case with GOP, when nothing else is selected)
*fixed regression in number2 where after dialog it requires complete redraw

Still need to fix the label reselection after it has been added/removed.
*fixed vu meter having bogus scale values when changing the label and some out-of-sync selection issues with the dialog. Needs to be vetted like number2.

*began working on clean-up of iemgui regressions and preexisting bugs (still need to figure out inconsistency with the hiding/showing of nlets, as well as inability to displace number2 after it has received a label message)

big refactoring #11 : replaced %lxOBJ by x%lx and removed nlet_tag from all iemgui, among other smaller changes