table add trackby function

[rdkmaster]

fixes #10
fixes #41

[coveralls]

Coverage remained the same at 33.815% when pulling bd4e0e5 on table-add-trackby into 10d9844 on master.

[coveralls]

Coverage remained the same at 33.815% when pulling a496bf3 on table-add-trackby into 10d9844 on master.

[coveralls]

Coverage increased (+0.1%) to 33.576% when pulling d91c9e8 on table-add-trackby into 530ea34 on master.

[coveralls]

Coverage increased (+0.1%) to 33.576% when pulling f1f4f92 on table-add-trackby into 530ea34 on master.

[coveralls]

Coverage increased (+0.1%) to 33.576% when pulling 8ca8188 on table-add-trackby into 530ea34 on master.

[coveralls]

Coverage increased (+0.4%) to 33.693% when pulling 433b6d8 on table-add-trackby into 9aac8d3 on master.

[coveralls]

Coverage increased (+0.4%) to 33.693% when pulling 2367042 on table-add-trackby into 6f89f35 on master.

[coveralls]

Coverage increased (+0.4%) to 33.693% when pulling db1f780 on table-add-trackby into 6f89f35 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling f9258e7 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling e470612 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling 1ad4dd2 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling efe9f89 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling 88c5118 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling 0165a79 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling e1e0134 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling 8d8b01b on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling 69d1e7d on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling 4701089 on table-add-trackby into 006ab45 on master.

[coveralls]

Coverage increased (+0.4%) to 34.406% when pulling bb28c79 on table-add-trackby into 006ab45 on master.