New dev version
Implements callCallback for jQuery.prompt.close

Partially solves the issue #46
Merge pull request #47 from Zalmoxisus/dev

Implements callCallback for jQuery.prompt.close
#47 adds implementation for callCallback for jQuery.prompt.close to src
Prevent overlapping the buttons

Example:
```(javascript)
$.prompt('<img src="http://upload.wikimedia.org/wikipedia/commons/a/a9/Example.jpg" style="float:right" />text');
```
Prevent shifting buttons

Example:
```(javascript)
$.prompt('text',{buttons:{'Button 1':true, 'Button 2 long':true, 'Button 3 very loooooooooooooooooooong':true}});
```
Merge pull request #48 from Zalmoxisus/dev

Prevent overlapping the buttons
#48 apply changes to src folder as well
#48 Remove min-width from css

After further discussion it is best not used
Compiles changes in src
rename base object to Imp
Restructure core to be instance based class
#46 fixes close button
#46 Remove use of id in html markup to avoid collisions with multiple prompts
Fixes window resize event handler
Converts $.prompt to a stack to manage Impromptu instances
Update docs and adds method getApi to help when using $.prompt stack
Updates $.fn.prompt to use $.prompt queue
#46 - Fixes X button not removing prompts from stack
#51 - Adds bower support with bower.json