Added BPM, Grouping, Key, Date (id3v22) and Recording Time (id3v24)

Some fields added:
BPM: TBPM (v22: TBP)
Grouping: TIT1 (v22: TT1)
Key: TKEY (v22: TKE)
Date: TDA (v22: TDA)
in ID3v2 and AbstractID3v2Tag and added new field
'recording time' (TDRC) for v24 in ID3v24Tag