[NEXUS-6045] drop unused static resource finder
[NEXUS-6045] move web resource types to org.sonatype.nexus.web package,
refactor into WebResource* names,
move CacheControl into WebResource
Drop useless AbstractNexusResourceBundle
[NEXUS-6045] cleanup names used by servlet, these aren't really purely _static_ resources
[NEXUS-6045] move web-resource specific plugin support bits to org.sonatype.nexus.plugin.support
[NEXUS-6045] tidy docs
[NEXUS-6045] tidy plugin resource, docs
[NEXUS-6045] dev mode resource tostring
[NEXUS-6045] docs and make nullables clear
[NEXUS-6045] Renderer -> TemplateRenderer, drop useless finals and modifiers in intf
[NEXUS-6045] impl tidy
no need to sync get() here
Merge pull request #275 from sonatype/NEXUS-6045-webresource-cleanup

REVIEW: [NEXUS-6045] webresource cleanup