Bug fix null input query handling

[divyasrinivasan1986]

HTML, Java script changes Handle empty query String in classifier to ensure it doesnt return any viable class. Removed logs in JS code.

[guruprasads7]

@divyasrinivasan1986 , The Issue still remains. Now the Send button is irresponsive, post entering the input in the text box

[divyasrinivasan1986]

@guru5590 This may be an issue with your cache. I checked again by downloading code from my branch and on the vm and it seems to work fine. Can you please check again after clearing cache(or the code is also present in VM in a. folder under my name which can also be used)?

[guruprasads7]

@divyasrinivasan1986 , You were right it was my cache issue. The send button is working as expected :)

Don't feel like I'm nagging you. But in the text box, if I do a double enter, still the no input is accepted :(

Attached is the sceenshots:

1) Intial state

2) First time carriage return is pressed

3) Second time carriage return is pressed

[divyasrinivasan1986]

@guru5590 I think the issue is because second carriage return is treated as a non-empty string. If we trim the input string to eliminate the white space on either side of the string, it should solve the problem. I will update the code accordingly.

[guruprasads7]

This commit, fixes the issue. Hence merging the code to master branch