[+BUGFIX] Fluid (ViewHelpers): The <f:base> ViewHelper now creates no self-closing <base>-tag, as IE6 will not render the page then.
[+TASK] Fluid (Core): Added more interception points for the interceptors to hook in.
[+TASK] Fluid (Core): Refactored interceptors. Now, one interceptor can register itself for many interception points.
[+TASK] Fluid (Core): The Escape-Interceptor can now be disabled inside the body of a Fluid-ViewHelper, if the ViewHelper sets $escapingInterceptorEnabled to FALSE (however, this is NO public api!). We need this feature for a TYPO3 v4 ViewHelper.