whitespace and oracle backend reporting
Ignore makefiles

Fallout from #1560
Check that the C++ compiler actually works.

AC_PROG_CXX still sets CXX, even if it doesn't
find a working C++ compiler:

http://osdir.com/ml/bug-autoconf-gnu/2010-05/msg00002.html

This causes the Boost checks to fail.

If AC_PROG_CXX finds a working compiler, it sets the GXX shell
variable. Test for this.

Fixes #1178
--enable-remotebackend-http is gone
Merge pull request #1575 from rubenk/remove-removed-option-from-travis

--enable-remotebackend-http is gone
Merge pull request #1571 from mind04/backend

whitespace and oracle backend reporting
Merge pull request #1574 from rubenk/issues/1178

Check that the C++ compiler actually works.
Merge pull request #1572 from rubenk/ignore-makefiles

Ignore makefiles