Merge pull request #781 from dcoeurjo/traceendblock

Fixing type issue in trace.endBlock()
Warning as error option
enabling some warning as error in travis
enabling some warning as error in travis
Fixing warnings
warnings
fixes
fixes
fixes again
more fixes
more fixes
 ChordNaiveComputer ok
renabling travis
renabling travis
temporary disabling itk
temporary disabling itk
Merge pull request #782 from dcoeurjo/Werror

"Warnings as Errors" flag
Rename README to README.md
Update README.md
Update README.md