Modernizing Rewrite

• Added ability to launch more than one PHP Development Server via Multiple Instances: index.js:38.
• Updated closeServer to no longer rely on the BSD (and Linux) lsof but rather kill the child_process via signaling SIGKILL.
• Code written in ES6.
• Added Status State machine to handle conflicting states properly. index.js:20.
• Implementing a default set of options in the .CTor, which can be overridden in the server(...) call. (.Ctor: index.js:85, server(...): index.js:133)
• Adding Gitter for port, since we can now have multiple instances index.js:126.
• JavaDoc Style commenting of methods for developers who prefer to jump through code to learn the library.

Removes keepalive; Allows router script in any directory and start the server using "-t" option.

Merge pull request #29 from BR0kEN-/remove-keepalive

Remove unused "keepalive" option

Fixes stdio options

Merge pull request #17 from Thomas-Lebeau/master

fix stdio options

Many fixes!

Merge pull request #15 from ryanklose/master

Wait for base to exist before spawning php bin.