JSON exceptions

* Added option 'silent' to JSON parse method
Locales, yes/no

* Added yes/no to cz locales
Forms, datepicker

* Date picker is empty when given invalid value
[fix] Attr model, datetime

* Fixed datetime handling in attrmodel
Forms, images

* Fixed not sent image input in forms
Resource, lists

* Added support for resource lists
Elementary styles

* Removed focus border from some browsers
RTE, proper

* Added Proper - Rich text editor
Forms, RTE

* Integrated rte into forms
Forms, RTE

* Added styles
Forms, RTE

* Adjusted rte controls z-index
Forms, RTE

* Fixed HTML escaping
Template, to_html

* Added decoding escaped html strings
Input class

* Fixed method visibility to input class
* Added inline docs to input class
* Dropped unused methods from input class
Makefile, log

* Minified changelog
No pages error

* Migrated no pages error to common exceptions
Output class, headers

* Output class sends headers only once
Fatal errors

* Fatal errors are displayed
Database error description

* Added nicer database errors
Output yield

* Yield shifts array with templates to avoid loops