Updating vector and quaternion class

Updating vector and quaternion class

Vector Class

 - Adding method to update vector like a queue
 - Adding method to compute variance of vector
 - Adding method to check if vector is initialized

Quaternion Class

 - Updated the quaternion normalization method

signed-off-by: Ramasamy <ram.kannan@samsung.com>
Change-Id: I08d7fcb6c62b1fc02c53954009d13127b73e65c3