Alter bake to create channel page

[jmickey]

With the introduction of channel specific pages the bake command for importing channels need to be updated to also create the relevant content/<channel-name>.md file.

[dirkkelly]

Good call! Will look at it this week unless someone else tries it as a first issue!

[dirkkelly]

Other improvements this feature needs

• update the documentation
• bake configuring the channel directory
• bake downloading the image
• bake importing the description