updated dev-version to 2.5.2
Merge branch 'master' into stable/2.5.x
fixed pagination issue, #410
added input type email to grid system, #434 (also #398)
fixed duplicate with search form (2.5), #442
changed tinyMCE dialog layout (2.5), #445
removed onclick_attribs in submit line (2.5), #450
changed updateFormIndex behavior with inlines because of #448, based on #449 (2.5)
compressed js, including fixes for #448 and #449
type with docs (quickstart), fixed #452
load cycle from future, fixed #441
added notes about the location of a custom dashboard to the docs, fixed #446
exceptions with autocompletes, fixed #440
block custom views with index.html, fixed #431
change log update
final updates for version 2.5.2
changed development version of 2.5.x to 2.5.3
allow actions without add permission in object-tools

Adding items to object-tools-items would be really helpful, but the 
original solution only displayed items in that block when the user 
had add permission. For some operations (e.g.: export as csv) the
add permission is not needed.

This change allows for adding items to this block freely from child templates.

Might be similar/related to #101
Merge pull request #459 from zsoldosp/patch-1

allow actions without add permission in object-tools
fixed floating properties of form in change-form (2.5), #460