use individual help patches for higher math objects ([cos], [sin], etc.) and cross-reference with math-help.pd

remove one of the tutorial files that has a filename which causes problems under Windows (with the OS itself, outside of any of Pd's implementation details)

port a196a31c4435c865580c28ba87a1c309fd52fe8a from Pd-l2ork: updated closebang and initbang help files

*updated message-help.pd to reflect the new $0 functionality

(manually ported)
*added @pd_help in addition to the existing @pd_extra that can be used for paths
*made pddplink capable of parsing @pd_extra and @pd_help
*updated cyclone help files to make advantage of the @pd_extra/@pd_help paths in order to reference global help file documentation

*removed unnecessary files in preparation for the launchpad integration (thanks to Albert Graef for the report)

added local version of the docs due to increasing number of local changes that make it difficult to sync with external

small helpfile fixes

lrshift minor bug fix (takes float scalars as signals)
pd~ bug fix -- hung with -ninsig 0
abs~ bug fix -- it was just badly wrong