Display correct day of the week with negative UTC offset

A duplicate subtraction of the UTC offset and DST time caused the creation
of an incorrect timestamp. In return this caused us to go back too far and
therefore moved us back one day.

Conflicts:
	root/portal/modules/portal_calendar.php
[ŧicket/223] Set correct permissions to uploaded files (644)

phpbb_chmod() only sets the owner permissions. As we need to set the
permissions for all users, it is not possible to use phpbb_chmod().

B3P-223
[feature/clean-up] Remove duplicated code from portal modules

B3P-CU

Conflicts:
	root/portal/modules/portal_poll.php
[update/2.0.2] Update files for 2.0.2 release

This includes an update of MODx to 1.2.6

B3P-UPDATE-2.0.2

Conflicts:
	root/install/index.php
[fix/xml] Use dependency again for mod version check links

B3P-FIX_XML
[remove/format_birthday] Remove useless function format_birthday()

B3P-RM-FORMAT_BIRTHDAY
[translate/changes] Translate 2.0.2 changes to German

B3P-TRNS-CHANGES
[ticket/226] Use $this->c_class instead of $c_class

B3P-226
[fix/german] Fix incorrect language strings in the German files

B3P-FIX-DE
[fix/update] Copy German language files in German language update

B3P-FIX-DE_UPDATE
Merge pull request #152 from marc1706/apply/master

Apply/master