Made convenience functions randn_float & randn_double for standard normal random variables.  Also edited comment on abs() function to reflect what it truly does.
Made convenience functions randn_float & randn_double for standard normal random variables.  Also edited comment on abs() function to reflect what it truly does.

lambday/shogun,sorig/shogun,sorig/shogun,shogun-toolbox/shogun,karlnapf/shogun,geektoni/shogun,besser82/shogun,Saurabh7/shogun,Saurabh7/shogun,Saurabh7/shogun,shogun-toolbox/shogun,Saurabh7/shogun,Saurabh7/shogun,sorig/shogun,lisitsyn/shogun,besser82/shogun,lambday/shogun,lisitsyn/shogun,karlnapf/shogun,lambday/shogun,Saurabh7/shogun,Saurabh7/shogun,sorig/shogun,geektoni/shogun,lisitsyn/shogun,shogun-toolbox/shogun,shogun-toolbox/shogun,besser82/shogun,sorig/shogun,shogun-toolbox/shogun,lisitsyn/shogun,besser82/shogun,geektoni/shogun,lambday/shogun,karlnapf/shogun,lisitsyn/shogun,lisitsyn/shogun,lambday/shogun,geektoni/shogun,Saurabh7/shogun,Saurabh7/shogun,karlnapf/shogun,besser82/shogun,geektoni/shogun,shogun-toolbox/shogun,sorig/shogun,karlnapf/shogun,karlnapf/shogun,besser82/shogun,geektoni/shogun,lambday/shogun