Prepare for 1.0.0 release.

CHANGELOG.md

-# Changes in version 1.0.0 - 2015-11-xx
+# Changes in version 1.0.0 - 2015-12-05
 
  * Major changes
-   - This is the initial release after almost four years of development.
+   - This is the initial release after four years of development.  Happy
+     4th birthday!
 

build.xml

 <project default="jar" name="descriptor" basedir=".">
-  <property name="release.version" value="0.0.1-dev" />
+  <property name="release.version" value="1.0.0" />
   <property name="sources" value="src"/>
   <property name="classes" value="classes"/>
   <property name="tests" value="test"/>