Add in PREFIX/etc/julia/juliarc.jl file for site-specific commands to be run at startup

Lays the groundwork for addressing #4222
Install platform-dependent juliarc files during `make dist` step
Add in juliarc.jl for OSX, remove environment setting in the Applescript launcher
add links to issues, harmonize whitespace
don't add links for now
undo automatic tab conversion
reinsert links, but not inline this time
change mimewritable to take instance rather than type
Merge pull request #4377 from bjarthur/master

additions to documentation re. "ans", and Python
various edits to 2866dd45d92cdc2dea59c861c0893b686bfcafd8.
doc typo fix
Merge pull request #4356 from waldir/patch-1

add links and adjust/harmonize line wrapping
improve inlining of varargs functions. helps #4374

this does not fully fix the problem yet, but improves the situation.
the next problem is that for some lengths of argument lists the
function is transformed in such a way as to make it not inlinable
by current rules.
Change ’ into '

In my system (Ubuntu 12.04) "Julia’s" renders as "Juliaâs" using `nroff -man julia.1 | less`
Merge pull request #4379 from waldir/patch-1

Change ’ into '
Fix #4346
Fix #4206 - who wants to guess what happened here ;)
fix #4378
make Permutation's next function not modify its second argument (s), to fix compability with filter, see issue #4381
added tests to check fix of #4381