fixed double loadbang regression due to implementation of internal pre-loadbang mechanism for the preset engine.

fixed segfault in disis_netsend/receive just like the one in the previous commit. Also added "port" inlet to netreceive that allows on-the-fly port change.

fixed segfault with netsend/receive using tcp packets where netreceive is deleted while netreceive is connected to it (after which sending data to netreceive would result in a segfault)

fixed regression where iemgui widgets within GOP sometimes got redrawn even though that was completely unnecessary

fixed gop getrect detection for objects that have been previously relocated to allow for consistent positioning

fixed resetting of cursor and proper highlighting logic. further refinements to the multiconnect cursor/key logic

Fixed bug http://sourceforge.net/tracker/index.php?func=detail&aid=2457992&group_id=55736&atid=478070; hopefully also fixed incorrectly reported hit/selection boxes for nested structs (like the one reported in the previous bug report)

fixed segfault when closing array window/subpatch due to lack of checking of valid resize/move hook pointers

added ability for preset_hub to write/read presets or entire scenes from files. Improved documentation to reflect new additions and to improve existing.

numerous bug-fixes for mouse down/up and key press combos (e.g. shift-clicks for multiconnect and dragging within an object)

improved nlet highlighting (integrated it into glist), fixed bug with multiselect with mixed objects (accelerated and legacy)