Merge pull request #25 from wpreul/master

Clone no longer converts undefined properties to null
0.7.5
Allow empty header attributes
node 0.10
Add nextTick wrapper
Update index.js
fix typo in readme
Merge pull request #26 from iamdoron/master

Readme typo
doc fix for merge(,,false)
Merge pull request #27 from malixsys/patch-1

doc fix for merge(,,false)
Closes #28
Assert now formats error messages