Not returning a promise when initializing the SDK

[somentelucas]

• Not returning a promise when initializing the SDK
• Adding contributors to Readme
• Removing test_dist/ need by using require syntax in tests

Fixes #11

[mbnakaya]

@somentelucas, e quanto ao build que falhou, no Travis CI?

[coveralls]

Pull Request Test Coverage Report for Build 134

• 7 of 7 (100.0%) changed or added relevant lines in 4 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-7.8%) to 87.76%

---

Files with Coverage Reduction	New Missed Lines	%
dist/client/api.js	2	67.35%

Totals
Change from base Build 117:	-7.8%
Covered Lines:	288
Relevant Lines:	300

---

💛 - Coveralls