#515 was cherry-picked to indigo but did someone test this on indigo? As far as I can see there are no tests for this and the template is never compiled so Travis doesn't fail.
Using c++11 fails for me on indigo with all updated 14.04 packages (with the indigo-release docker image as well) because of ambiguous isnan calls in the ikfast solver source. This is because of this bug which is fixed in later libc versions but not in the one used in 14.04.
So I think this should be reverted in indigo and this would also prevent #575 because #537 added C++11 features.