support for Mesos 1.3.x v1 APIs

[jdef]

• api/v1/lib/scheduler/scheduler.proto
• api/v1/lib/master/master.proto
• api/v1/lib/maintenance/maintenance.proto (n/a)
• api/v1/lib/allocator/allocator.proto (n/a)
• api/v1/lib/agent/agent.proto
• api/v1/lib/executor/executor.proto
• api/v1/lib/mesos.proto
• api/v1/lib/quota/quota.proto (n/a)

• helpers for new calls
• passing all unit tests

NOTE: scheduler/calls.Roles has been removed in favor of calls.ReviveWith and calls.SuppressWith

[coveralls]

Coverage increased (+0.1%) to 57.185% when pulling 5a646fb on jdef_protos_1_3_x into b6a3797 on master.

[coveralls]

Coverage increased (+0.03%) to 57.116% when pulling d4f22c6 on jdef_protos_1_3_x into b6a3797 on master.

[coveralls]

Coverage decreased (-0.1%) to 56.982% when pulling b08f1ba on jdef_protos_1_3_x into b6a3797 on master.

[coveralls]

Coverage decreased (-0.3%) to 56.828% when pulling 9d5cb64 on jdef_protos_1_3_x into b6a3797 on master.

[coveralls]

Coverage increased (+0.5%) to 57.539% when pulling 1004d28 on jdef_protos_1_3_x into b6a3797 on master.