issue #1179
add default sort for every model
add did by customer and modify customer did
merge code
add did and did_binding and convert cdrs file
cdrs file download
add cdrs search
add customer id to cdr
merge from master
add admin cdr query and file download
merge from remote
add model test
Merge branch 'master' of https://github.com/natware/nautilus
merge code and ignore dump.rdb
customer balance
Merge branch 'master' of github.com:natware/nautilus
ignore dump.rdb and merge
add controller rspec
Merge branch 'master' of https://github.com/natware/nautilus
update model_concerns