+package.json
Add test suite

+ Add ``mocha``, ``should``, and ``irc`` as dependencies
+ Add test suite to ``package.json``
+ Add ``module.exports`` to ``psend.js``
+ Add IRC test suite
- Remove test from main ``psend.js``
+ Add ``mocha.opts`` with sensible defaults

The test failed; it may be desirable to ensure that the test is supposed
to fail before merging this commit.

To test, use ``npm test``.
Delete server.js
Update package.json
Fix the tests and merge [Close #2]