sawlead and such
Merge branch 'master' of github.com:digego/extempore

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updates to utility proc
Merge remote-tracking branch 'upstream/master'
bug fix
added xdelete for xlist
added xdelete test
native threads for xtlang
compiler performance improvements for polymorphic funcs
update README with ST2 instructions
fix broken link in README
fix another couple of broken links in README
revert previous bad commit 716f6ad
updates for buffer based MT audio
MT buf audio updates
compiler macro fixes
native thread update
start of additional libc stuff
add topclock
fixed typo