Added duration to notification variable list
Move around french documentation.
Fix links.
Move Spanish documentation up a level.
Remove Spanish documentation.

It only included two pages.
Remove Japanese documentation, it's just a single page.
Pull pt-BR user docs up a level.
Fix links including /docs/.
Fix links.
Fix more links.
Remove bloge stuff.
Remove Hirofile.
Fix links to about.travis-ci.org.
Fix links to about.travis-ci.org
Remove “words to avoid in technical writing”

Words were taken from this blog post:
http://css-tricks.com/words-avoid-educational-writing/. It recommends to
avoid using the phrases “obviously”, “basically”, “simply”, “of course”,
“clearly”, “just”, “everyone knows”, “however”, “so” and “easy”. I did a
project-wide search for these phrases and rewrote things where I thought
it improved the sentence.

For future reference, this is the command I ran to find these:

    ag -i '(obviously|basically|simply|of\scourse|clearly|just|everyone\sknows|however|so,|easy)' user
Update docs on git submodules

The docs currently do not reflect that:

* git submodules are init/updated automatically if there's a `.gitmodules` file
* the automatic integration can be turned off by setting `submodules: false`
Fix wording
Update build-configuration.md
Update build-configuration.md
Merge pull request #4 from travis-ci/sf-update-git-submodule-docs

Update docs on git submodules