Show localized block type names and descriptions
Show localized block type names and descriptions

Block type names and descriptions are always shown in English (with the
methods getBlockTypeName and getBlockTypeDescription of the class
Concrete5_Model_BlockType).
This pull request changes these two functions adding a call to t().

TimDix/concrete5,avdevs/concrete5,TimDix/concrete5,MichaelMaar/concrete5,TimDix/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,avdevs/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,avdevs/concrete5