Add note about updating system path

Remind users to update system path since script does not. 

Well, at least on Windows it doesn't update PATH. Perhaps this should be qualified?
Merge pull request #1888 from patricktokeeffe/patch-1

Add note about updating system path
get-pip.py option examples

Conflicts:
	docs/installing.rst
break out the examples so we can add a qualifying footnote for --user installs

Conflicts:
	docs/installing.rst
Merge pull request #1944 from qwcode/critical_get-pip_docs

docs for get-pip.py options
Replaces spaces in username.
Merge pull request #1986 from matham/master

Replaces spaces in username.
Revert "Merge pull request #1986 from matham/master"

This reverts commit cb26c0b8cb00d18c75503ce4ee59a95a619e8189, reversing
changes made to bb8c7428ab40dde4af92e696ff518e82e214cd24.
 Reverse package list to install required dependancies first
Add a test for issue #1934
Merge pull request #2116 from bukzor/buck-remove-tag-svn-revision

remove tag_svn_revision to fix test, same as PR #2045
Use a secure randomized build directory when possible
Merge pull request #2122 from dstufft/randomized-build-directory

Use a secure randomized build directory when possible
Add the CVE for the randomized build directory
Properly handle equality of Link objects with other objects
Alias the "real" names as pip._vendor.* when the vendored are missing
Use a real install instead of develop
Conditionally install the pip._vendor items
Test unvendoring on Travis
Add a warning to the setup.py if used with no bundled