Fixing absolute paths resolution

[outring]

Hi!

I've found out, that it's not possible to run ts-node with absolute paths like that:

ts-node /home/user/test.ts

Here's the fix for that.

Cheers

[outring]

Also I haven't found any tests, but found test scripts in package.json — is that ok?

[coveralls]

Coverage remained the same at 87.817% when pulling e21f667 on outring:hotfix/absolute-paths into ceab825 on TypeStrong:master.

[blakeembrey]

Thanks for the catch, the tests are https://github.com/TypeStrong/ts-node/blob/master/src/ts-node.spec.ts.

[outring]

@blakeembrey, ooops, wait for a PR with tests then :)