Merge pull request #4255 from amitmurthy/amitm/docupd

Doc: Updated darray and @parallel to reflect usage of only worker processes.
Update linalg.rst

missing ` in documentation for "repeat".
Merge pull request #4257 from sje30/patch-1

Update linalg.rst
Refactor events with integer flag fields and accessors.
Fix logic bug in FDWatcher wait()
Disable shift-invert arpack tests.
Pkg.status: more informative output (unregistered, dirty attributes)
Pkg.tag: ensure that existing has eltype VersionNumber.

This could cause no method errors in certain circumstances.
Pkg.tag: allow symbolic versions defaulting to :patch [close #4092]

Also refuse to tag when the package repo is dirty. This is to keep
people from accidentally tagging without committing everything. If
you really have changes that you don't want to include in the tag
then you can just stash them while tagging.
Pkg.tag: distinguish between bumping (default) and patching.

Bumping the version will remain on 0.0.0 (or other rewritable versions)
whereas patching will always go to the next real patch version.
Pkg.register(pkg,[url]): register a new package with METADATA.

I'm considering wether this should automatically register any tagged,
annotated versions that are in the package repo.

This also changes the package scaffolding to make a git:// url the
default origin for a new package since that's what is expected when
registering it.

Closes #1753.
versions: correctly compute next versions of pre-releases + tests.
Pkg: allow versions like 1.2- and 1.2+ to be re-tagged like 0.0.0

Tag "bumping" understands this convention and tags appropriately.
Pkg.tag: use only ancestral tags to determine the next tag.
reprmime should not override string escaping for text/plain (fixes JuliaLang/IJulia.jl#72)
document --color option. closes #4265
Document color prompt flag in man page
Merge pull request #4267 from rennis250/patch-1

Document color prompt flag in man page
fix #4266
Merge branch 'master' of github.com:JuliaLang/julia