more blocking functions for integer and double types

[sonalgoyal]

We need to add more blocking functions for Integer and Double types other than the double and exact ones that we have

In all cases, handle 0 and Nan and negative numbers appropriately.
Both

• number without last digit. eg for integer type 234 and 233 will return 23, double type - 234.5 and 233.5 will return 23
• range functions. return 0 if num < 10, 1 if 10 < num < 100, 2 if less than 1000 but greater than 100, 3 if less than 10000(this can be odelled as FirstChars/LastChars functions, one base class and one derived class for each range)
• lessThan 0 function

extra functions for Double type

• number with one digit after decimal (23.4445 gives 23.44)
• number with 2 digits after decimal
• 3 digits after decimal
  (both above to be modeled with one base class like firstchars)

[sonalgoyal]

please have appropriate junits for each - check the similarity function junits for an idea of how to build these junits.

[navinrathore]

Code changes made. Junits added.

[sonalgoyal]

i dont see the pr?