Merge pull request #1892 from lambday/develop

fix uninitialized memory in TParameter::copy and added unit-test
LARS bug fixed
lars unit test added
coding style changes in LARS unittest and NEWS updated
Merge pull request #1893 from mazumdarparijat/pca

LARS bug fixed
mention memory and crash in the latest fixes
LARS unittest error fixed
clean up in error message
Merge pull request #1897 from mazumdarparijat/pca

LARS unittest error fixed