hg: jdk9/dev/jdk: 8179022: Add serialization spec as markdown

[magnus.ihse.bursie at oracle.com]

Changeset: 3120da6408c7
Author:    ihse
Date:      2017-04-23 21:33 +0200
URL:       http://hg.openjdk.java.net/jdk9/dev/jdk/rev/3120da6408c7

8179022: Add serialization spec as markdown
Reviewed-by: erikj, mchung, rriggs

+ src/java.base/share/specs/serialization/changelog.md
+ src/java.base/share/specs/serialization/class.md
+ src/java.base/share/specs/serialization/examples.md
+ src/java.base/share/specs/serialization/exceptions.md
+ src/java.base/share/specs/serialization/images/class.gif
+ src/java.base/share/specs/serialization/images/version.gif
+ src/java.base/share/specs/serialization/index.md
+ src/java.base/share/specs/serialization/input.md
+ src/java.base/share/specs/serialization/output.md
+ src/java.base/share/specs/serialization/protocol.md
+ src/java.base/share/specs/serialization/security.md
+ src/java.base/share/specs/serialization/serial-arch.md
+ src/java.base/share/specs/serialization/version.md