Check for the <no-storage/> and <no-permanent-storage/> hints in
addition to <no-store/> and <no-permanent-store/>. XEP-0334 (0.1)
mentions both variants, and unfortunately, both of them are in use.
Use dynamic Rebar configuration
Make iconv dependency optional
Disable transient_supervisors compile option
Add hipe compilation support
Only compile ibrowse and lhttpc when needed
Make it possible to generate an OTP application release
Add --enable-debug compile option
Add --enable-all compiler option
Add --enable-tools configure option
Add --with-erlang configure option.
Add --enable-erlang-version-check configure option.
Add lager support
Improve the test suite