Added double tests
Fixed a bunch of tests
removed isNegative0 function as it was not needed
Added more rebust -0 check.
Fixed up tests a little bit.
Implemented UnrestrictedFloat.js
Added UnrestrictedFloat tests
resolved merge conflict
resolved merge conflict
fixed merge conflict
a little linting and beautification
Merge pull request #53 from extensibleweb/UnrestrictedFloat-type

Implementation of Unrestricted float + tests; some minor fixes to Float. 
correcting merge conflict (tabs and newline at EOF).
Taking HEAD version instead of master.
fixed merge conflict