Restict travis to non-experimental branches.
Restict travis to non-experimental branches.

joachimneu/Python-Markdown,gogobook/Python-Markdown,me-and/Python-Markdown,fernandezcuesta/Python-Markdown,waylan/Python-Markdown,fernandezcuesta/Python-Markdown,cyisfor/Python-Markdown,joachimneu/Python-Markdown,cyisfor/Python-Markdown,evertqin/Python-Markdown,evertqin/Python-Markdown,fernandezcuesta/Python-Markdown,gogobook/Python-Markdown,me-and/Python-Markdown,waylan/Python-Markdown,evertqin/Python-Markdown,cyisfor/Python-Markdown,joachimneu/Python-Markdown,me-and/Python-Markdown,gogobook/Python-Markdown