Update BlockView.php

Handle content-render's exception.
Fix #173: at_ui.module: Inline sourcode viewer.
at_ui.module > Source > Issue when render PHP file
+ comments
at_ui.module > Source > Display directories before files, print them in bold.
at_ui.module > Source > Display directories before files, print them in bold (follow up).
Make yaml_parse_file() & yaml_emit() public.
Merge pull request #174 from v3knet/yaml-reader-function

Make yaml_parse_file() & yaml_emit() public
Update Process.php

helper.content_render: Throw exception if no template is valid.
Update View_Alter.php

Entity template: Catch exception of wrong configuration.
Update View_Alter.php

Entity template: On exception, do not print out the error message.
Update at_ui.info

No more require devel.module
at_ui.module: Provide /at/twig/views form, tool to print available variable in views.
Support working-copy option.
Correct directory sorting.
Fix #183: Typed Data API.
Merge pull request #181 from tienvx/working_copy

Support working-copy option.
Merge pull request #182 from tienvx/directory_sorting

at_ui.module > Source code report > Correct directory sorting
Unset blocks.
Merge pull request #184 from tienvx/entity_template_unset_blocks

at_doc: entity template reporting > Unset blocks.