[BioC] Biobase typo in example of AnnotatedDataFrame man page

[James F. Reid]

Dear BioC,

answering to a recent query on the mailing list I noticed a small typo 
in the example provided in the AnnotatedDataFrame help page:

AnnotatedDataFrame(data=df, varMetaData=metaData)
should be
AnnotatedDataFrame(data=df, varMetadata=metaData)

also, no error is given when calling directly AnnotatedDataFrame (the 
varMetadata slot is empty) but calling new('AnnotatedDataFrame') 
produces an error where 'varMetaData' is not a valid slot name.

Best.
J.