new comment can add
Merge branch 'master' of https://github.com/Cyberfrog/Adda

Conflicts:
	routes/index.js
last commit msg is wrong..
load topic button is added , last five comment is done
made a function get_last5_comments() to get only the last 5 comments and
we created new module as adda_module which has unit functions.
we used get_comments() to get all comments on a topic and handle request
for it.
Merge branch 'master' of https://github.com/Cyberfrog/Adda
in add new topic condition for user.startTopicIds is changed from blank string to false