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Fix regexp that inadvertedly broke magics with explicit % prefix.

Fixes to input splitting to reduce the occurrences of spurious attribute access.

Update rev number

Update threads calls to avoid a DeprecationWarning from GTK.

unmarshal p4 -G output to list

- Modified clock() to return total (user+system) time. Introduced clocku/clocks to specifically return user/system times.

New extensions ipy_p4 for %p4 magic (perforce)

- Improvements to demo classes and some magic fixes.

- Small fix to pexpect to prevent unhandled exceptions at Python shutdown time.