Log Message:
- Update to icedtea-web-1.5.2.
- Install web start launcher and manpages again.
- Allow building with openjdk8.

New in release 1.5.2 (2014-11-26):
* NetX
  - RH1095311, PR574 -  References class sun.misc.Ref removed in OpenJDK 9 - \ 
fixed, and so buildable on JDK9
  - RH1154177 - decoded file needed from cache
  - fixed NPE  in https dialog