correctly check if subscriptions are enabled

subscription system should work now again

This readds the last part of the subscription system: the normal "every"
subscriptions.

added list test

more subscription refactoring BROKEN

now the actual sending of bulk messages (digest, list) is reimplemented
and partially tested.

Still not complete

handle empty changelog in getRecentsSince()

first start at refactoring the subscription system BROKEN

This introduces a class for nicer wrapping and easier testing. Some
functions were changed to provide nicer APIs (no throwing around of
unes

first start at refactoring the subscription system BROKEN

This introduces a class for nicer wrapping and easier testing. Some
functions were changed to provide nicer APIs (no throwing around of
unescaped regexps) and to simplify things (hopefully).

The refactoring isn't completed yet, so this will break the subscription
system.

The goal is to move as much subscription related stuff to this class as
possible. Currently there is some code in lib/exe/indexer.php and maybe
elsewhere (common.php?). Additionally everything should be covered by
tests. A few tests are included here already.

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some minor cleanups in subscription.php

use $INPUT in inc/actions.php

code cleanup in template.php

* make use of $INPUT
* clean up coding style
* add phpdoc comments

extract method for Input class

makes it easier to access our do parameters

do not recompress already minified js FS#2574

renamed mailfromnon to mailfromnobody, use in subscriptions

added mailfromnone internal option FS#2170

html validity fixes (removed name and align in some plugins)

added some missing spaces (to popularity and revert plugins)

fixed objects not showing properly (FS#2572)

copy not move uploaded files FS#2465

This fixes problems with setgid bits on the media directory

more utf8_basename fixes

Fix utf8_basename for files in the root directory

fix utf8_basename for file names without any directory

fixed some RTL+IE7 bugs, mainly background icons and search form (FS#2569)

added missing include

only execute valid instructions FS#2432

decode utf8 filenames in JpegMeta FS#2553

removed deprecated