Fix pysh profile

- Fixes for doctest support. Need more testing, esp. to be sure they don't introduce any side-effects, since I'm messing with the FakeModule object which Pickle and others depend on. - Small fixes in object inspection. - Restored a number of magics that should NOT have been moved out to ipy_legacy.

callable aliases now get _ip as first arg

added _ip.itpl, to enable var expansion with callable aliases

improve callable alias inspection

sh profile uses 'cygwin in path' to determine ls --color=auto alias and whether to load ipy_fsops.py

more visible timestamp for ipy_fsops.inote

fix mkdir in ipy_fsops.collect

mglob dir fix, ipy_fsops.py added, var_expand for callable aliases

Change mglob behaviour: if isdir(foo), no longer return contents of foo but just the name foo