Merge branch 'release/0.14.3' into develop
Add a test-case - check redundancies
Check huge amount keys for func of retrieving redundancies
Modify test of retrieving redundancies
Update test-case
Performance Tuning for retrieving redundancies (25%)
Add poolboy
Modify sync of rings
Generate rings into the procs
Revise license
Revise license
Change table type from ordered_set to set
Performance Tuning for retrieving redundancies (80%)
Add last and prev methods
Performance Tuning for retrieving redundancies (DONE)
Refactor api's code
Modify api's test-cases
Performance tuning for retrieving redundancies
Revise data-structure for ring
Revise data-structure for ring - add next-addr-id