Adding definition and stub of the functions for the new tags
Removing old test yaml files
Adding export functions for new tags
Updated documentation for the new export functions
Renaming the functions related to block_role to use the new tag
Skeleteon for future validation function
Adding query for block creation custom function
Adding syntactic validation for blog->create case
Adding auxiliary function to check the existance of a block with the given module and delta
Adding semantic validation for block->block create case
Removed info field during export for both cases
Adding syntactic and semantic validation for create->modify case
Adding function to execute block->modify
Adding success messages for custom functions
Adding syntactic validation for block->delete case
New auxiliar function for mdt constraint and changes in semantic validtion for modify case
Semantic validation for delete, same case as modify
Adding custom function for block->delete case
Explanation for changes needed in block
Changes in the export function to export metadata in case we are processing a custom block