Need reviewer: readmes and make/script additions

[Kelly O'Hair]

Need reviewer for some README adjustments and additional make/scripts

6909331: Add vsvars.sh to the jdk repository (handy cygwin way to get vcvars32.bat run)
7023111: Add webrev script to make/scripts
7003845: README-builds document proper location of forest extension, provide alternatives
6896934: README: Document how the drop source bundles work for jaxp/jaxws
6896978: README: Updates to openjdk README-builds.html
6903517: README: OpenJDK additions needed - cygwin issues

http://cr.openjdk.java.net/~ohair/openjdk6/jdk6-README/webrev/

-kto