Add requirements.txt for use of build.py

Resolves #115
new.html.template: clarify content label
apps: updated new.html
Update build.py header with pip install instructions
Add header to requirements.txt explaining use.
travis.yml: spectralsun's sauce username & key
Merge pull request #116 from bramwelt/bramwelt/requirements-txt

Add requirements.txt for use of build.py
travis.yml: dont run tests on pull request
travis.yml: use if statement
Merge pull request #117 from spectralsun/iss112-easier-create-new

Iss112 easier create new