add missing README to animation, sc, sd, slideshow, starmath, sw

animations/README

+Contains containers for the css::animation UNO API, used in [[slideshow]] and [[sd]].

rhino/README

 The Scripting Framework makes use of the Rhino (http://www.mozilla.org/rhino/)
-JavaScript interpreter, available under the Mozilla Public License 
+JavaScript interpreter, available under the Mozilla Public License
 (http://www.mozilla.org/MPL/MPL-1.1.html).
 
 In addition, to support the debugging of scripts contained in OpenOffice.org

sc/README

+Spreadsheet application code.

sd/README

+The core directory for the impress/draw applications.
+
+Think of impress as a hack on top of draw.

sfx2/README

 This is the gui code, much of which is now deprecated.
 List of documents open would be traceked,
-raw C__ code; gutsy core of document management and loading. 
+raw C__ code; gutsy core of document management and loading.
+

slideshow/README

+Contains the new impress slideshow engine introduced in OO.o 2.0

starmath/README

+Formula editor code for writer ([[sw]]).

sw/README

+Writer application code.