Minor build changes

- qz.ks moved to root folder, projects compile with ../qz.ks.
- keystore passwords put back into project.properties.
- changelog updated to reflect features (so far)
- pdfbox_qz.jar copied task fixed to ..\qz-print\lib\pdfbox_qz.jar
(incorrect dash in filename)
- qz-print uses pdfbox_qz.jar as dependency (copied from it's own ant
task) instead of "pdfbox_1.8.4_qz.jar" to be consistent with
jssc_qz.jar, etc.