CDAP-1044, 1062: Added to release notes about fixing CDAP-1044, CDAP-1062

"Fixed a problem with the CDAP upgrade tool not preserving..."
[CDAP-1044](https://issues.cask.co/browse/CDAP-1044)

"Fixed a problem with the readless increment implementation..."
[CDAP-1062](https://issues.cask.co/browse/CDAP-1062)

Staged at: [http://stg-web101.sw.joyent.continuuity.net](http://stg-web101.sw.joyent.continuuity.net/cdap/2.6.0-SNAPSHOT-r2.6.0_fix_release_notes/en/reference-manual/release-notes.html#cdap-bug-fixes)
The ":ref:" syntax is a Sphinx extension that does inter-document references. If you look at the [release notes page on the web server](http://stg-web101.sw.joyent.continuuity.net/cdap/2.6.0-SNAPSHOT-r2.6.0_fix_release_notes/en/reference-manual/release-notes.html#cdap-bug-fixes), you'll see that link points to the [instructions for the upgrade tool](http://stg-web101.sw.joyent.continuuity.net/cdap/2.6.0-SNAPSHOT-r2.6.0_fix_release_notes/en/admin-manual/installation/installation.html#install-upgrade).

At least it does when I don't forget a back-tick at the end...