STYLE: CMake style fixes

Change-Id: Ia1fb2b5863d8ac32b06814f5554a52502e1c747a
STYLE: Convert tabs to spaces

Change-Id: I3aa5bc318fc98879e24da603aa3175ac07d43057
Merge topic 'ConvertTabsToSpaces'

14eaf59 STYLE: Convert tabs to spaces
Merge topic 'CMakeListsStyle'

ad20dbe STYLE: CMake style fixes
ENH: Bump LIBSVM version to 3.17

Change-Id: I0d8bd891d8b6d0997d5c90e991c39b1786b2fd0e
Merge topic 'BumpLIBSVMVersion'

cf2da40 ENH: Bump LIBSVM version to 3.17
BUG: Fix unknown CMake command MIDAS_ADD_TEST regression

Change-Id: I2abb2bd7b609fa7b3a011d63b295946bb6b23465
Merge topic 'FixFailedBuildRegression'

708e691 BUG: Fix unknown CMake command MIDAS_ADD_TEST regression