Implement Tail functionality

[shrikrishnaholla]

Currently, a very hacky solution is being employed to get the last n lines of logs. A new process is being spawned which execs the UNIX tail -n command. There is no readily available library to emulate this functionality in a cross platform manner (Though there are implementations of tail -f). A library/module needs to be implemented that does this for us, preferably in a cross platform manner.
References that may help (Thanks @sandeepraju!):

1. Source code of tail command
2. This stackoverflow question
3. This thread in v0.1.0 Logging bot #1