Schema existence is now checked in Search

this avoids instantiating the schema twice

safeguard against lookup mixing in Search

We can not join lookup schemas with any other schema on pid. Which means
we can not allow selecting more than one lookup schema in Search.

fix config parsing of multiple schemas

added tostring() method for easier schema debugging

output the key not value for unknown option in ConfigParser

Save user on schema change and more imexport tools

media fields need unique IDs. fixes #152

fixed references to old Integer type

Reevaluate page assignments when replacing them

removed Integer type

Instead the more flexible Decimal type (with roundto:0) can be used.

Delete assignments as well

Version upped

removed unecessary function calls

Add helper for im&export by other plugins

fixed problem with multicolumns and made the param name clearer

added missing schema file

when Page uses titles, sorting should use title #146

Decimal type needs to type cast for order and compare #146

make sure pages are assigned in tests

give types a way to influence sorting

add slight shadow for aggregation images

this helps with knowing the border of an image and makes it easier to
click outside the image for inline editing.

Fixed multi fields for inline editor

Fixed applying of Template copying for new fields.

make Schema::getTimestamp() return the creation timestamp

fixed tests

some cleanup regarding timestamp setting in AccessTable*