Use Buffer.allocUnsafe() in enviroments that support it

[RyanZim]

Resolves #391

[coveralls]

Coverage decreased (-0.1%) to 86.277% when pulling a86d8b4 on buffer into 84717b8 on master.

[RyanZim]

Should I add a small instanceof test case for the buffer util?

[jprichardson]

Should I add a small instanceof test case for the buffer util?

What do you mean?

[jprichardson]

Oh like instanceof Buffer inside of the Buffer util function? Use Buffer.isBuffer()

[manidlou]

Should I add a small instanceof test case for the buffer util?

I am still not sure what you mean. You mean test if the returning result of the buffer util is an instanceof Buffer?

[RyanZim]

I was wondering if I should add a testcase to lib/util/__test__ that tests the buffer util and ensures that it returns a buffer.

[manidlou]

I was wondering if I should add a testcase to lib/util/test that tests the buffer util and ensures that it returns a buffer.

Oh alright. Basically it is a good idea to have test for each feature that we add or change. However, I am not sure if this one is necessary.