xml compatibility fixes (mainly entities to unicode conversions)

Input validation for media manager

Fix for FS#2522 / Now all places of $lang['restored'] are covered with the restored-date information

display uploadable file size in media manager FS#2425

Merge branch 'master' into htmlmail

* master: (382 commits)
Romanian language update
Marathi language update
Arabic Language Update
when there's not enough space for images, make sure they s

Merge branch 'master' into htmlmail

* master: (382 commits)
Romanian language update
Marathi language update
Arabic Language Update
when there's not enough space for images, make sure they stay proportional (might be FS#2480)
added minimal RTL print styles (part of FS#2185)
moved plugins' rtl.css to their style.css counterpart (part of FS#2185)
removed all browser-specific gradients as the recently (in 42ff6730) introduced svg makes them unnecessary
removed comments from accidentally commented lines in tpl_includeFile()
removed obsolete template file
added tpl_includeFile() to core
Make getTitle method in remote interface public
Changed an error code in XML-RPC interface. This error hasn't anything to do with the rest of the -32600 errors.
BG: language update
Korean language update
fixed performance issues with gradient in Firefox (which also added gradient support for IE9) (FS#2447)
deleted very old (and unused) images
added accidentally removed '<?php' back in (was in 57fc5edd)
wrapped X-UA-Compatible meta tag with conditional comments
added explanation to todo in _forms.css
removed problematic 'overflow: hidden' from lists again ('unfixes' FS#1950)
...

Conflicts:
inc/auth.php
inc/load.php

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coding style updates

added div.table around non-editable content as well (FS#1980)

removed 'view original' button from new media manager again (was added in b8a84c03) and made a link around the image instead, as that is a more minor change (as it should be during the RC phase) and

removed 'view original' button from new media manager again (was added in b8a84c03) and made a link around the image instead, as that is a more minor change (as it should be during the RC phase) and is what was originally planned

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always show full filename as tooltip in mediamanager

Fix sorting in media manager search (FS#2423)

do not rely on tmpfile() in the AJAX uploader backend FS#2417

Fix double URL-encoding in media manager (FS#2403)

Avoid a warning when a media cachefile doesn't exist yet

fixed link in popup media manager to fullscreen media manager to open in correct namespace (FS#2401)

Merge pull request #66 from dploeger/28db35ad3dd974cc2f627d25f7bcc16e9fd0ceac

This fix is alright. The action gets escaped by DokuForm's use of buildAttributes()

deprecated 3rd parameter of cleanID() FS#2377

For some reason trailing/leading underscores were allowed when uploading
files. But the rest of the code (eg. listing or downloading files) never
suppor

deprecated 3rd parameter of cleanID() FS#2377

For some reason trailing/leading underscores were allowed when uploading
files. But the rest of the code (eg. listing or downloading files) never
supported this. This patch removes this special case for uploading files
to streamline ID cleaning of pages and media files.

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Fixes SYMPTOMS of FS #2393

Replaced mail_send calls with new Mailer class

fixed media list options in new mediamanager to work without JavaScript again (FS#2363)

MediaManager: Check DOKU_PREF cookie value for validness

readded delete in popup and link to full mediamanager FS#2347

media manager: IE7 fixes (and other small improvements)

whitespace fixes: tabs to spaces

media manager: fixed and improved diff views

More mediamanager reworking