Remove Entries of 'PRECLASS:1,NPC=1,Monster=1'

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@24123 ef53c05b-3124-4d59-ae7d-fe3273f42be7
Gradle build for PCGen
* Add pcgenRelease task to undertake release
* Gate release on release notes being in place
* Add production of pcgen.exe via NSIS
* Create sources jar
* Gather all release files into build/release folder
* Generate SHA-256 hashes for release files
Issue#: CODE-2597


git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@24124 ef53c05b-3124-4d59-ae7d-fe3273f42be7