Do not decode + to spaces in URIs

Spaces were incorrectly decoded to spaces in URIs. Wiki pages and categories with '+' in their names were accessible only through a link with encoded + (%2B), but this should not be necessary.
Merge pull request #412 from duairc/configurable-recent-activity

Make the default "since" for the activity page configurable
Merge pull request #413 from duairc/iftabs

Only set the 'tabs' template variable if there are actually tabs
Merge pull request #416 from duairc/for-on-labels

Added for attribute to all the labels on all the forms
Merge pull request #417 from duairc/no-access-code-for-password-reset

Removed access question from password reset form, only for register form
Merge pull request #419 from duairc/footnotes.js-bug

Fixed accidental breakage of footnotes.js link in previous commit
Merge pull request #420 from duairc/updated-pageToString

Updated pageToString, which was still using the old metadata format
Revert "Create page if no match is found when using _go"

This reverts commit 1328545e1b9e86132b4937ac5fb2afc314bb0758.

I hadn't fully appreciated the loss of the old prefix-match behavior,
which was useful.  So for now I want to pull this change back.
(See #397 and discussion on gitit-discuss.)

Note that the old behavior copied wikipedia.

The standard way to create pages is to first create a link
to the page in an existing page, then click on the link.
Bump network version bounds.
Handlers: Fixed duplicate function definition for fileAnchor.
Exports:  Added ICML.
Types: Added Org and DocBook to PageType. (API change)
Allow pages to be written in Org mode or DocBook syntax.
Version bump to 0.10.4.
allow multiple categories in a "_category" url

If multiple categories are placed in the path of a "_category" URL, separated by "/" characters, the request will return a page listing all pages that contain all of the categories.
using all instead of intersect for test
replacing splitOn with wordsBy, using comma as sep
adding filter links for _category pages
Merge pull request #422 from wcaleb/multi_category_url

allow multiple categories in a "_category" url
Fixed image export for DOCX, RTF, slides, etc.

Still broken for PDF.

See #399.