extend multiclass nb
fixed errors
For #1935 LibLinear unit test added.
Fix the function solve_l2r_lr_dual failed, when set bias is true.
Seting prob->n correctly.
Add 7 Tests.
Merge the common code into a function.
Add 2 LAR test case.
Add 2 LAR test case.
Naming correct for lars and liblinear unit-testing.
Merge pull request #1946 from lambday/develop

minor documentation fix
Merge pull request #1914 from Saurabh7/multiclassnb

extend multiclass nb
Merge remote-tracking branch 'shogun/develop' into develop
Merge pull request #1945 from pl8787/develop

For #1935 LibLinear unit test added.
revert the changes of 56ceab6 for main_unittest.cc
remove unwanted SG_SDEBUG messages from unit-test