Adding a way to override the local timezone
fix the behavior of Date.parse and Date.UTC
add offset check
merge from Master - date function fixes
simplify changes -- use prototypeObject in constructor instead of static method
formatting cleanup
complete custom local time zone feature
remove unused using statement
Merge pull request #1 from honestegg/timezone-override

Merge Timezone override changes into fix-date-functions branch
Merge pull request #65 from honestegg/fix-date-functions

Fix date functions