More reasons why prefixing is good

Inspired by http://www.dwheeler.com/essays/filenames-in-shell.html

See merge request !1604

Add comment about note attachment redirect.

See merge request !1612

New Issue Header

Fixes #2073

- I've switched it from "New Issue" to "Create Issue". Small change, but grammatically correct.

See merge request !1611

Mention audit events ee feature in logs documentation.

Related to gitlab/gitlabhq#1979

See merge request !1609

Add 'confirm' option to users api

For #1990

Based on https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/129

See merge request !1610

Conflicts:
	lib/api/users.rb

Remove CI sections related to release tool, update steps in monthly and patch release documentation.

See merge request !1608

Remove CI sections related to release tool, update steps in monthly and patch release documentation.

Update project_milestone_path update route.

See merge request !1605

Redirect old note attachment path to new uploads path.

See https://gitlab.com/gitlab-org/gitlab-ce/commit/0d884ff2b1beae085050fe6729bd88783891fc71#note_891797

See merge request !1607

Fix and test user contributed projects.

Fixes #2077.

See merge request !1606

Include number of affected people in all/group mention autocomplete item.

As mentioned in #2054.

To minimize misuse of all/group mentions, the autocomplete title includes the number of members this mention will notify, so users will be more considerate what groups they mention.

Example:

at-all "**all** All Project and Group Members (12)"

at-gitlab "**gitlab** GitLab (12)"

See merge request !1596

Introduce shortcuts for routing helpers

See merge request !1600

Filter icons look like proper buttons

The filter icons (Push events, Merge events, Comments, Team) now have a border
that signifies they can be pushed. This not only keeps it in line with the rest
of the application buttons, but it makes it more obvious, especially for the
Merge events button with a checkbox icon.

Fixes #1993

See merge request !1576

Fixes grammatical consistency and small changes

This commit adds consistency to small things like periods, commas,
and gives additional information to buttons and headers, etc.

Fixes #2002, #2005, #2003.

See merge request !1570

Added information to tooltips

Tooltips now have meaning by mentioning their function ("Filter by..."). Fixes #1992

See merge request !1571

Fix import status page project links for new Rails.

Fixes #2059.

See merge request !1593

Add z index for diff header so sticky header stays on top on diff comments.

See merge request !1603

Inspired by http://www.dwheeler.com/essays/filenames-in-shell.html

Allow mass-unassigning of issues

Fix GitLab && Gitorious importers. Hide already imported projects

Fixes #2060

See merge request !1594

Small fixes

Fixes #2062 and #2061

See merge request !1601

Fixes #867

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