remove .settings - Eclipse specific local settings not needed in distribution

.settings is created locally by Eclipse upon import as gradle project to store Eclipse specific defaults.
No need to include in distribution.

Also
   - .project   and
   - .classpath
are Eclipse specific and created by gradle and should be deleted (as not needed and IDE specific)
- left them for now as files might be needed for building project with Ant (build.xml) which is  likely still used by some.

.settings/org.eclipse.jdt.core.prefs

@@ -1,4 +0,0 @@
-eclipse.preferences.version=1
-org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
-org.eclipse.jdt.core.compiler.compliance=1.8
-org.eclipse.jdt.core.compiler.source=1.8