Git supports the push -u flag since a while now,
and it's nice to show the user that afterwards
one can push without arguments

* Add 30 second overview
* Make GitHub parse intra-document MarkDown links
  Sadly, the MarkDown specs are missing this feature

Thanks to Flavius Aspra for the Arch Linux howto

Add mr's vcsh lib to docs

* Make include more resilient (Thanks to Thomas Koch)
* Fix emphasis issues with underscores in variable names in MarkDown

Thanks to Brain May for pointing this out.

fixes #22

Thanks to Brian May for reporting this.

fix #22