Fix clang builds for CI.
Enable make check again.
Fixed make check command.
Removed elemental submodule.
Removed .gitmodules file since we have no submodules.
Squashed 'src/elemental/' content from commit 22f7e1c

git-subtree-dir: src/elemental
git-subtree-split: 22f7e1cb0c508eff1f80fd1b46dad72c5262d449
Merge commit 'dfce7c25e6063a8768982aef4062270b5697982f' as 'src/elemental'
added additional truncation mode that accounts for higher dimensions
Shortened the transform speed test (should not be part of validation test anyway)
Slight tweak of the last commit: FLOP rate is now computed correctly.
Merge pull request #109 from justusc/master

Add Elemental subtree
Disable avx instructions for CI builds.
changes to ke matrix, load balancing currently commented
travis-ci: trying to disable so
Revert "travis-ci: trying to disable so"

This reverts commit b2b8a1f3e836b20833cacde725203b21dfabb7c4.
travis-ci: trying to disable sse3 assembly
Added omitted ASFLAGS to assembly compilation commands
travis-ci: another attempt to downgrade assembly level
added active message stats to profile and made thread safe again
profile some more routines