DOC: Clarify strange syntax for itk::MetaEvent
DOC: Clarify strange syntax for itk::MetaEvent

The itk::MetaEvent inherits from the
global namespace ::MetaEvent that is provided
by the MetaIO/src/metaEvent.h class.

Change-Id: I43aaeeee22298b69cfe4f1acb06186f9599586ac

msmolens/ITK,BlueBrain/ITK,jmerkow/ITK,PlutoniumHeart/ITK,vfonov/ITK,msmolens/ITK,richardbeare/ITK,PlutoniumHeart/ITK,stnava/ITK,fbudin69500/ITK,jmerkow/ITK,stnava/ITK,jmerkow/ITK,BlueBrain/ITK,hjmjohnson/ITK,malaterre/ITK,jmerkow/ITK,spinicist/ITK,spinicist/ITK,zachary-williamson/ITK,biotrump/ITK,InsightSoftwareConsortium/ITK,msmolens/ITK,LucasGandel/ITK,thewtex/ITK,fedral/ITK,ajjl/ITK,blowekamp/ITK,stnava/ITK,thewtex/ITK,LucHermitte/ITK,BRAINSia/ITK,stnava/ITK,fbudin69500/ITK,spinicist/ITK,jcfr/ITK,LucasGandel/ITK,jcfr/ITK,vfonov/ITK,jcfr/ITK,jmerkow/ITK,InsightSoftwareConsortium/ITK,zachary-williamson/ITK,BlueBrain/ITK,hjmjohnson/ITK,malaterre/ITK,fedral/ITK,PlutoniumHeart/ITK,Kitware/ITK,fedral/ITK,PlutoniumHeart/ITK,fedral/ITK,fbudin69500/ITK,biotrump/ITK,blowekamp/ITK,fbudin69500/ITK,ajjl/ITK,spinicist/ITK,thewtex/ITK,vfonov/ITK,biotrump/ITK,biotrump/ITK,vfonov/ITK,fedral/ITK,fedral/ITK,spinicist/ITK,BlueBrain/ITK,stnava/ITK,blowekamp/ITK,Kitware/ITK,zachary-williamson/ITK,spinicist/ITK,vfonov/ITK,blowekamp/ITK,hjmjohnson/ITK,BRAINSia/ITK,malaterre/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,ajjl/ITK,jmerkow/ITK,InsightSoftwareConsortium/ITK,msmolens/ITK,BRAINSia/ITK,biotrump/ITK,jcfr/ITK,PlutoniumHeart/ITK,PlutoniumHeart/ITK,LucasGandel/ITK,msmolens/ITK,thewtex/ITK,malaterre/ITK,ajjl/ITK,ajjl/ITK,jcfr/ITK,stnava/ITK,Kitware/ITK,thewtex/ITK,thewtex/ITK,zachary-williamson/ITK,BlueBrain/ITK,LucasGandel/ITK,jmerkow/ITK,blowekamp/ITK,BRAINSia/ITK,jcfr/ITK,fedral/ITK,vfonov/ITK,msmolens/ITK,fedral/ITK,zachary-williamson/ITK,richardbeare/ITK,biotrump/ITK,spinicist/ITK,BlueBrain/ITK,fbudin69500/ITK,BRAINSia/ITK,msmolens/ITK,Kitware/ITK,LucHermitte/ITK,malaterre/ITK,fbudin69500/ITK,BRAINSia/ITK,LucHermitte/ITK,hjmjohnson/ITK,fbudin69500/ITK,PlutoniumHeart/ITK,malaterre/ITK,Kitware/ITK,vfonov/ITK,stnava/ITK,zachary-williamson/ITK,PlutoniumHeart/ITK,blowekamp/ITK,jcfr/ITK,biotrump/ITK,blowekamp/ITK,BRAINSia/ITK,LucHermitte/ITK,stnava/ITK,LucHermitte/ITK,richardbeare/ITK,malaterre/ITK,ajjl/ITK,zachary-williamson/ITK,BlueBrain/ITK,hjmjohnson/ITK,hjmjohnson/ITK,LucasGandel/ITK,richardbeare/ITK,vfonov/ITK,LucHermitte/ITK,ajjl/ITK,thewtex/ITK,LucHermitte/ITK,LucasGandel/ITK,LucHermitte/ITK,spinicist/ITK,malaterre/ITK,spinicist/ITK,jcfr/ITK,Kitware/ITK,zachary-williamson/ITK,zachary-williamson/ITK,richardbeare/ITK,BlueBrain/ITK,InsightSoftwareConsortium/ITK,hjmjohnson/ITK,jmerkow/ITK,richardbeare/ITK,InsightSoftwareConsortium/ITK,LucasGandel/ITK,Kitware/ITK,msmolens/ITK,InsightSoftwareConsortium/ITK,malaterre/ITK,blowekamp/ITK,richardbeare/ITK,stnava/ITK,ajjl/ITK,vfonov/ITK,biotrump/ITK,fbudin69500/ITK