Update set_data.md

Typo
Merge pull request #512 from a-romanov/patch-1

Update set_data.md
Fixed type of $safeOption in \APY\DataGridBundle\Grid\Column\Column::setSafe
Merge pull request #514 from Bup3/master

Fixed type of $safeOption in \APY\DataGridBundle\Grid\Column\Column::setSafe
Fix DateTime renderCell
Unable row modification in manipulateRenderCell function
Update DateTimeColumn.php
Add class attribute and remove unless variables
update spanish translations
Merge pull request #530 from nclsHart/spanish-translations

Fix #492 update spanish translations
Added czech translation file
Merge pull request #532 from ufik/czechTranslation

Added czech translation file
Update set_permanent_filters.md
Update PHPExcel_installation.md
Makes the Vector class able to ready PHP DataTime objects. It's very hand when it's comming from a Doctrine query
Merge pull request #536 from medinadato/master

Makes the Vector class able to ready PHP DataTime objects. It's very han...
Fix html input type url
Update vector_source.md
Add hasColumn method to Grid in order to check if a column exists in both 'columns' and 'lazyAddColumn' properties before processLazyParameters is called
Merge pull request #549 from cyrilbarragan/master

Add hasColumn method to Grid in order to check if a column exists in bot...