Remove automake support

Since the cmake tool chain is now stable, the automake tool chain is removed from musrfit.
This makes documentation and code less cluttered.

Conflicts:
	configure.ac
	src/Makefile.am
	src/classes/Makefile.am
	src/external/MuSR_software/Makefile.am

src/external/nexus/Makefile.am

@@ -1,25 +0,0 @@
-## Process this file with automake to create Makefile.in
-
-h_sources = \
-  PNeXus.h
-
-cpp_sources = \
-  PNeXus.cpp 
-
-include_HEADERS = $(h_sources)
-
-AM_CPPFLAGS = $(HDF5_CFLAGS) $(NEXUS_CFLAGS)
-AM_CXXFLAGS = $(LOCAL_PNEXUS_LIB_CXXFLAGS)
-
-AM_LDFLAGS = $(LOCAL_LIB_LDFLAGS)
-CLEANFILES = *~ core
-
-lib_LTLIBRARIES = libPNeXus.la
-
-libPNeXus_la_SOURCES = $(h_sources) $(cpp_sources)
-libPNeXus_la_LIBADD = $(NEXUS_LIBS)
-libPNeXus_la_LDFLAGS = -version-info $(PNEXUS_LIBRARY_VERSION) -release $(PNEXUS_RELEASE) $(AM_LDFLAGS)
-
-pkgconfigdir = $(libdir)/pkgconfig
-pkgconfig_DATA = PNeXus.pc
-