iterate over tables not headers in aggregation

added data attributes needed for the inline editor

Merge branch 'master' into revisioncol

* master:
properly parse width settings in aggregation table

properly parse width settings in aggregation table

makes sure only valid CSS values are supplied

make label part of Page column

do not show a result table if there are no results

There is no sense in showing headers, dynamic filters, pagination and a
sum row when there are absolutely no results. This change omits the
whole s

do not show a result table if there are no results

There is no sense in showing headers, dynamic filters, pagination and a
sum row when there are absolutely no results. This change omits the
whole shebang if there are no results (except when the table is
dynamically filtered and the empty set might be a result of that filter)

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Use DokuWiki new autoloader for class files

No longer do we need to register our own autoloader. Namespace had to be
vendor prefixed.

reuse column's type renderer to output sums

This makes sure that sums will apply the same formatting as the values
they summarize.

fixed summarize option. closes #83

fix error when an aggregation tries to select a nonexisting column

adjusted active filter output

correct summary output

streamline sort direction handling

we now use a boolean everywhere

some form fixes for the dynamic filters

flatten array returned for URL parameters

renamed methods for more coherence

major refactoring of the whole table aggregation

this is still completely untested