[TxMt] Italics and Bold in Markdown.

Hi,

Textmate incorrectly labels italicised and bolded text.

In the following markdown: "this is s_om_e markdown", 'om' will be tagged as italicised. When converting to HTML, 'om' will not be italicised. I am guessing that the Markdown processor requires that italicised text be surrounded by white space. The same is also true for bolded text.

I was able to modify the language grammar to not incorrectly tag the text. My solution is probably quite naive but it did work for me. Can someone with more regex fu vet this and can we get it added to the official bundle please (assuming it should be added and I am not wrong on this).

Luke.