bugfix issue #36

TODOLIST does not filter with duebefore or dueafter options (#36)
fixed wrong dates in condition
start-/due-ignore flag

ignore todos without a start/due date if the filter ends with a '!'
~~TODOLIST startbefore:+100!~~ will also give alle todos which have no start date set
Update plugin.info.txt

date updated
filter start/due-before/after enhancement

additional flag for date filters of TODOLIST
attributes affected: startbefore, startafter, duebefore, dueafter
eg:
startafter:! list all tasks where startdate in todo is set
startafter:2014-10-30* list all tasks starting after given date or where no startdate in todo is set
user&date in todo when checked

add user and date information when checkbox is clicked
bugfix

logic of start/due-filters corrected
filter on completed-date
filter on completed-date, completed-user

check of completed-user is not yet implemented in syntax/list.php
bugfix
filter on completed user

eg.
TODOLIST completeduser:username
TODOLIST argument ns:. ns.:

TODOLIST argument ns:. and ns:.: is now available
function filterpages updated
ns:. matches current namespace and all subsequent namespaces
ns:.: matches only subsequent namespaces
enhance code ns: filter

optimize and bugfix
logic and bugfix ns: argument

logic didn't work in some cases for namespace filter.
Update plugin.info.txt

set: date   2014-11-02
optimisation, performance

filtering on namespaces was very slow.
now filter_ns()  is calld before parsing the page content.
translation update
Merge pull request #39 from dokuwiki-translate/lang_update_16

Translation update (zh)
translation update
Merge pull request #40 from dokuwiki-translate/lang_update_33

Translation update (fr)
Update plugin.info.txt

set date