support for specifying IPs and emails by default, this works as a simple authorization system.
fixed problem with the client IP address retrieval
Added position atribute to tooltip, resolves #12
Fixed tooltip when image is very large
implemented tab notification support
only blink tab when message is not from receiver
dont allow empty messages to be sent, resolves #15
refactoring to reuse selectors
remove html tags from message and invalidate empty messages
removes &nbsp to deny empty messages
implemented html tag filter at server side
set max height of images
Merge pull request #21 from israelbgf/standalone-support

Merged Standalone support
reorganized file acquires, modified json file
Some notifications, new readme, and another way to send messages (without inform the user)
merged chat improvments
Merge branch 'viniciusmichelutti-master'
added steps to contributing flow