Merge branch 'gcc-4.7' into gcc-4.8
Merge branch 'gcc-4.7' into gcc-4.8
switch to c++14
Merge branch 'gcc-4.7' into gcc-4.9
drop defaults from Sandwich templ. specialization

Fix github issue #7
precise type conversions in sequence

Fix github issue #13
Merge branch 'gcc-4.9' into gcc-4.7