* t/00-first_design.t: refactoring the test to use 'substr' instead of 'split'
* t/00-first_design.t: correcting a typo
* t/01-load.t: tring to load the class
* t/02-weight.t: adding the tests against the weight attribute
* lib/Biblio/Record/USBC.pm: first increment to pass the tests against the 'weight' attribute
* t/02-weight.t: adding a new test to check the computed weight
* lib/Biblio/Record/USBC.pm: first implementation to pass the test against the computed weight