duration calculation algorithm added to SoundUtils.java
duration calculation algorithm and related JUnit test cases are added.
Merge branch 'master' of github.com:nla/banjo into bs-dsc-393-duration
code indentation changed to 4 chars
Merge branch 'master' of github.com:nla/banjo into bs-dsc-393-duration
method to convert duration to HH:MM:SS format is moved to SoundUtils.java and related JUnit tests are added. CopiesController.java and form.ftl are updated to make ajax call for duration calculation.
Merge branch 'master' of github.com:nla/banjo into bs-dsc-393-duration
code cleanup
Merge pull request #529 from nla/bs-dsc-393-duration

Bs dsc 393 duration