hi, i just add some api for taglib v2 (now v2.0.1)

[shenngw1127]

From this February, i just add some API for taglib v2 (now v2.0.1) to complete my command line project.

this api include:

• get/set/remove album_artist, composer, copyright, lyrics, track_total, disc_number, disc_total, date
• fixed about track_number/track_number_string
• get/set/remove properties
• support windows file system filename contains NOT iso-8859-1 characters
• add new support files (taglib v2 do it, i just marked the file extension)

Yesterday, i just add extract/remove picture api, but set_pic not work! So, i have open an issue in taglib project for help.

All commit on dev branch. Please check it.

Thank you!

sheng