New README files

[Kelly O'Hair]

Working on the readmes for the new builds.

Done with this one:
    http://hg.openjdk.java.net/build-infra/jdk8/raw-file/tip/README


Still working on this, moving a great deal of the information to Appendix's, which still
need to be organized, merged, deleted, cleaned up, etc.
    http://hg.openjdk.java.net/build-infra/jdk8/raw-file/tip/README-builds.html

Please send me any comments or observations.

-kto