Update serializers.js

This fixes the issue you run into when trying to use a TimeUUID for a column name on a columnFamily.insert(). The column name cannot be a TimeUUID object, but needs to be a String. (Object keys cannot be objects themselves.)
Merge pull request #97 from beatlevic/patch-1

Update serializers.js
updated travis.yml
use 0.10 not 1.0
Update .travis.yml to add new versions and attempt to fix hang issue.
attempt to fix hang in travis
attempt to fix travis hang
attempt to fix hang
dont hang while troubleshooting to ensure we dont block travis workers
Fix merge conflict