Avguard MAXScript Extension Package

The legendary Avguard extensions have been improved even more, adding
dozens of incredibly useful methods/globals for the maxscript
programmer...

v6.0.8 - added setModContextBBox, setModContextTM,
toUpper, toLower, disableRefMsgs, enableRefMsgs, makeUniqueArray,
windows.getChildrenHWND, windows.getChildHWND, windows.getMAXHWND,
windows.getDesktopHWND, custAttributes.getDefInstances,
substituteString, systemTools.getEnvVariable,
systemTools.setEnvVariable, clearControllerNewFlag,
replace_LF_with_CRLF, replace_CRLF_with_LF, scanForNewPlugins ... fixed
getclipboardText/setclipboardText to fix up CRLF