Fixed some PHPDoc in modPackageBuilder
Static file is required when static is checked in template
Static file is required when static is checked in chunk
Static file is required when static is checked in plugin
Static file is required when static is checked in snippet
Closing #modx-header tag
Closing #modx-header tag

Merge remote-tracking branch 'origin/pr/651' into develop

* origin/pr/651:
  Closing #modx-header tag
Add validation for static_file for static elements

Merge remote-tracking branch 'origin/pr/650' into develop

* origin/pr/650:
  Static file is required when static is checked in snippet
  Static file is required when static is checked in plugin
  Static file is required when static is checked in chunk
  Static file is required when static is checked in template
Merge remote-tracking branch 'origin/pr/643' into develop