Support for multiple validators on a single input https://github.com/huei90/angular-validation/issues/5
Squashed commit of the following:

commit e4b848bad8153dff5c59ee1d977af4986bc96b56
Author: Huei Tan <huei90@gmail.com>
Date:   Sat Aug 23 20:52:35 2014 +0800

    Add multiple validation DEMO and API documentation

commit f60ecf67f417b30a165bad6e5762d3454e29b2df
Author: Huei Tan <huei90@gmail.com>
Date:   Sat Aug 23 20:40:54 2014 +0800

    Allow multiple validators https://github.com/huei90/angular-validation/issues/5

commit 744c2e6d65a8f5167eff0a92fee11756752a48ee
Author: Huei Tan <huei90@gmail.com>
Date:   Thu Aug 21 11:04:34 2014 +0800

    Remove multiple validator (temporarily)