Add more replace functionality

For link tags, meta tags, and arbitrary strings
Add replaceStrings option
Use function form of use strict
Give replaceStrings priority
Merge pull request #8 from okcoker/master

Add more replace functionality
chore(readme): clarify new replace functionality
chore(0.4.0): cutting a new release
Merge branch 'master' of github.com:cburgdorf/grunt-html-snapshot
and bump version to 0.4.1
Conflicts:
	package.json