Fix #480 - Compute 'now' on validation
4.8.1
Enable node 0.11 builds
Validate object constructor.

Closes #408.
Merge pull request #481 from jagoda/feat-regex

Validate object constructor.
Fix #487: use correct exist form
Fix #487: 2nd part
4.9.0
Add a few badges
add missing semicolon
Merge pull request #489 from lloydbenson/master

add missing semicolon
fixed anchor link for string.regex
Merge pull request #491 from mrlannigan/master

Fixed anchor link for string.regex
Deny sparse arrays by default

Fixes #486.
Apply number().precision() when converts is true

Fixes #485.
Also output the context with errors

Fixes #462.
Add label to describe()