Add libunwind patch from Pyston
Update linalg.rst

Complemented linreg() documentation
Corrected examples on linreg function

Removed the prompt and semicolons
Mapping over [] returns []. Fixes #6719

map(f, []) now returns [] (an Array{None,1}).

Running [][map(x -> x, [])] no longer fails due to bounds checking errors.
This was happening because [] is of type Array{None, 1}, whereas ie
map(int, []) is of type Array{Any, 1}.
We no longer have a deps/random/*.tar.gz, so don't try to put that into `make source-dist`
fixes #6691, push access to METADATA should not be required for Pkg.publish(). Also check if any changes have been made.
improve docs for eval, isconst, isdefined
capture all global variables from Main in parallel constructs. fixes #6815

before we used `isconst` as a heuristic to identify variables that don't
need to be sent, but this doesn't really make sense. now we just send
interactive (Main) variables, and other modules are assumed to have been
evaluated everywhere (e.g. via `require`).
Merge pull request #6811 from purzelrakete/master

WIP: Mapping over [] returns []. Fixes #6719
slightly better types for map() of empty arrays
Correct description of short-circuit evaluation

Add that final value in a conditional chain may be anything and provide an example
Return NaN for median of vectors containing NaN. Closes #6486
Cholesky factor should always be Triangular.
Merge pull request #6819 from simonp0420/patch-1

Correct description of short-circuit evaluation
Merge pull request #6820 from JuliaLang/sjk/median_nan

Return NaN for median of vectors containing NaN. Closes #6486
Merge pull request #6821 from simonbyrne/cholesky-tri

Make Cholesky factor always be Triangular. Fix odd transpose bug.
Fixes #6307, src/support and src/flisp makefiles didn't apply JCPPFLAGS.
Merge pull request #6824 from ncnc/ncnc/jcppflags

Fixes #6307, src/support and src/flisp makefiles didn't apply JCPPFLAGS.
text/markdown is nonstandard, but is now supported in IPython (ipython/ipython#5648) and is useful to recognize as a text type
Merge pull request #6799 from brk00/patch-1

Update linalg.rst