API: expose pd.to_time

[jreback]

xref: #11832 allows pandas.tseries.tools.to_time to parse time types (into datetime.time) objects. These are not first class within the pandas data structures. But still may want to expose this.

[jreback]

xref #8343

[ricardogando]

Hi, is this issue still valid? Thanks

[DriesSchaumont]

@jreback can is issue be closed?