Since there are currently a lot of error coded returning 1, that mean
completly different thing, i guess it would be very nice to change this.
A client should not be forced to parse the error message, the error code
should be enough to explain the error.

This change suggests some error codes, that have a hierarchical
structure. In the following list the categories begin with = and the
error codes actually used with -.

= 100 	Page errors
== 110	Page access errors
--- 111	User is not allowed to read the requested page
--- 112	User is not allowed to edit the page
== 120	Page existance errors
--- 121	The requested page does not exist
== 130 	Page edit errors
--- 131	Empty page id
--- 132	Empty page content
--- 133	Page is locked
--- 134	Positive wordblock check

= 200 	Media errors
== 210	Media access errors
--- 211	User is not allowed to read media
---	215	User is not allowed to list media
== 220	Media existance errors
--- 221	The requested media does not exist

= 300	Search errors
== 310	Argument errors
--- 311	The provided value is not a valid timestamp
== 320	Search result errors
--- 321	No chances in specified timeframe

Without creating an IXR_Base64 object, the file will be encoded as base64, but send as string. The client XML-RPC parser cannot detect that it is meant to be a base64 encoded file.

adds html label to plugins in plugin management page

i needed to disable all plugins to figure out which plugin was causing
template error, so it was quite annoying to click on the tiny checkbox

added html label so i could at least click on the plugin name to toggle
checkbox state

just minor capitalization corrections

eo: language updates

de/de-informal language updates / fixed using mailprefix in registration and password lost notifications

fixed resizing mediamanager panels in Chrome using browser sniffing (FS#2351) - any better solution welcome

Changes to plugins cascade for FS#2359

renamed plugins.protected.php to plugins.required.php and added it cascade to allow overwriting as a local protected file

pt: paraphrased '<' character in some language files to avoid XML errors

as per commit 34bc7405

paraphrased '<' character in some language files (en, de, de-informal) to avoid XML errors -- please fix other languages

re-added font-size to .ui-widget of jqueryui theme to make programmatical removing of font-family easier

fix widths of panels in fullscreen mediamanager to be 100% when resizing (FS#2351) -- please test in different screen sizes, etc

This fixes password changing operations: password change and user
modification are two different operations on the AD backend - the user
modification should not be done on password only changes.