text: Type: URI {#URI}
  ==================
  
  Extends the [URI][] class to add methods for computing relative and absolute urls.
  
  URI Method: toAbsolute {#URI:toAbsolute}
  ----------------------------------------
  
  Returns the absolute path for a given url (i.e. a path beginning with '/'). If a different schemes or hosts are used, it returns the full url.
  
  ### Syntax
  
  	myURI.toAbsolute([base]);
  
  ### Arguments
  
  1. base - (*mixed*, optional) - either an instance of *URI* or a *string* (which will be passed to *URI*) that contains the base location for the path.
  
  ### Returns
  
  * *string* - the absolute path beginning with '/'.
  
  URI Method: toRelative {#URI:toRelative}
  ----------------------------------------
  
  Returns the relative path for a given url (i.e. a path that might include '../' for example). If a different schemes or hosts are used, it returns the full url.
  
  ### Syntax
  
  	myURI.toRelative([base]);
  
  ### Arguments
  
  1. base - (*mixed*, optional) - either an instance of *URI* or a *string* (which will be passed to *URI*) that contains a location that is relative to *myURI*.
  
  ### Example
  
  	var uri1 = new URI('http://www.test.com/this/is/a/path.html');
  	var uri2 = new URI('http://www.test.com/this/is/an/adjacent/path.html')
  	uri1.toRelative(uri2); //returns "../../a/path.html"
  
  ### Returns
  
  * *string* - the relative path.
  
  [URI]: /more/Types/URI
  