Fix node versions on travis

[feyzo]

Closes #322 (node v0.8)

• Problem was ^ version selector character.

request library had a dependency that uses the character and npm v1.4.10 had a bug with it. I moved npm version to minimum of 2.0

Closes #344

Scion is tested agains these versions.

• v0.12 (graphical cli log problem)
• v0.11 (graphical cli log problem)
• v0.10
• v0.08

Problems:

• Only v0.11 and v0.12 has a problem with cli table logging doesn't work as expected. It is merely a cosmetic issue. See below screenshot.
• v0.09 is not tested because it has an npm bug.