毋免suá檔案，改用filepath

[sih4sing5hong5]

To use Django FileField or FilePathField?

bulk_create

$ time python manage.py mikilim_to_wav 
算音檔網址...
Studio B-cm.wav
Studio A-cm.wav
Reference- (3).wav
Reference- (2).wav
Reference- (5).wav
Reference- (1).wav
Reference- (4).wav
攏總3002條，tng-tih匯入
好勢

real    0m4.861s
user    0m4.122s
sys 0m0.829s

本底1條1條匯是5秒

$ time python manage.py mikilim_to_wav 
算音檔網址...
Studio B-cm.wav
Studio A-cm.wav
Reference- (3).wav
Reference- (2).wav
Reference- (5).wav
Reference- (1).wav
Reference- (4).wav

real    0m5.997s
user    0m5.309s
sys 0m0.864s

匯入3002檔案