Add generalized repmat function as repeat
Document repeat function

Extend ind2sub and sub2ind to accept a reusable array of indices
Expose rem1 and fld1, defined by analogy with mod1
Restore basic ind2sub definition
change string indexing to avoid invalid indexes in more cases, and
eliminate the thisind() function

For example, search("∀ x", "∀", 1) used to give 1:3, which doesn't
make much sense since the "3" is an artifact of the encoding and isn't
a valid index. Now it gives 1:1, or in general a:b where a is the index
of the first found character and b is the index of the last found character.
Merge branch 'master' of github.com:JuliaLang/julia into jb/strindexchanges
work towards allocating new bindings per-scope and per-for-loop-iteration
(#1571)
Merge branch 'master' of github.com:JuliaLang/julia into jb/newvars
get sysimg building with new binding behavior (ref #1571)

the most problematic change was forcing for loop variables to be loop-local,
instead of reusing existing local vars. for example

    local i
    for i = 1:2
    end
    return i

currently works and returns 2.

for now, the behavior is to introduce new variables for each iteration unless
we are overwriting an existing local. comprehensions, however, always
introduce fresh variables and never overwrite existing ones.
Merge branch 'master' of github.com:JuliaLang/julia into jb/newvars
Merge branch 'master' of github.com:JuliaLang/julia into jb/strindexchanges

Conflicts:
	base/exports.jl
Merge branch 'master' of github.com:JuliaLang/julia into jb/newvars
Update mailmap
Merge branch 'master' of github.com:JuliaLang/julia
base/write.jl: use `s` instead of `t` to satisfy `@uv_write` macro.

Fixes #3972. This was probably a typo in the function definitions
but having a blessed variable name like `s` seems a bit sketchy.
Merge branch 'master' of github.com:JuliaLang/julia
test/sorting.jl: refactor sortperm tests to reduce cut-and-paste.
test/sorting.jl: add RadixSort to the integer sorting tests.

Adding RadixSort to the floating-point sort tests fails, however.

cc: @kmsquire
Merge pull request #3605 from JuliaLang/jmw/repeater

Add generalized repmat function as repeat
Update some info on the README.md

* Downloads page should point to julialang.org/downloads, users didn't know about the nightlies somehow!
* Update SuiteSparse instructions to record that after running contrib/repackage*.make, users should still set USE_SYSTEM_SUITESPARSE=1
* OSX Homebrew instructions should point to my tap
* Other minor nitpickings
introduce wait() semantics to all success() variants