Remove the redundant piddir from Makefile.am
Merge branch 'master' of github.com:OpenLightingProject/ola
Add some extra output at the end of ./configure
s/AC_HELP_STRING/AS_HELP_STRING/ in the configure scripts.
More automake cleanup.

Use CLEANFILES where appropriate.
Clean up include/ola/Makefile.am
Merge branch 'master' of https://github.com/OpenLightingProject/ola into e1.37-2