add 'top 15 scala DS libraries

minor adjust for scala 2.10

update html frame

remove 'transient' keyword for workspace to ensure proper initializat…

…ion after deserialization

Merge branch 'master' of https://github.com/haifengl/smile

set default learning rate to 200

test file existing before preview

make compiler happy

update doc to 1.2.3

update comments. people are more familar with the name 'one-hot encod…

…ing'