* BlogsController.cs: Fixes the Markdown usage of the uploaded
files:
Files are now renamed by dropping invalid characters and replacing
spaces by underscores.
An existing destination file is removed at upload.
* showdown.js: Renders audio and video at client side
* to-markdown.js: converts html audio and video to Markdown
* TestByteA.cs: adds a prefix, an underscore, to the test table
`_testbytea`
* Edit.aspx: Uses the new `showdown` javascript module (that
previously was named `Showdown`)
* Web.csproj: cleaning
* MarkdownDeep.dll: Renders video an audio
* GruntFile.js: Was pollution
9912d0cbb2