Update publish.js

[ghost]

give a clear description for Meteor publish

[chrisbutler]

@spyhole i think this is good and will be helpful for some users, but does iron have the sort of comments in other places?

we've generally removed them because most people using the scaffolding don't need to be reminded/see examples of what will already be generated for them... so having lots of these comments just adds weight for no good reason

i took a shot at making the comment generation configurable (especially for controller generation) so maybe that can be expanded and this can also be wrapped in that configuration conditional?

[ghost]

@chrisbutler +1 for making the comment generation configurable