Implemented Observatory getDefaultPier, added unit tests
Merge pull request #11 from jmfee-usgs/get_default_pier

Implemented Observatory getDefaultPier, added unit tests
Added Mark class and unit tests
Bad spaces
Added end to class, changed tests
Changed test to use expect instanceOf
Pulled Reading.js
Fixed typo and some whitespace issues.
Added Measurement class and Unit tests.
removed reading_id
Changed Unit Tests
Changed tests to use object, cleaned up white space.
Changed test to use expect instanceOf, and pulled reading_id from Test.
Resolving conflicts in test/index.js
Re-added Pier class with getDefaultMark
Pier class with getDeaultMark
Removed a mis-place parenthesis and some extra whitespace
Probably fixed the lint/grunt errors
Removed tests that didn't make sense
Changed funtion to function, was spelled incorrectly.