Relocate source files to an src/ sub directory

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

Makefile.am

@@ -1,22 +1,10 @@
 ACLOCAL_AMFLAGS     = -I m4
 
-lib_LTLIBRARIES     = libite.la
-pkgincludedir       = $(includedir)/lite
-pkginclude_HEADERS  = lite.h queue.h conio.h tree.h strlite.h strdupa.h strndupa.h strnlen.h
-libite_la_SOURCES   = chomp.c copyfile.c dir.c fexist.c fisdir.c fmode.c fparseln.c		\
-		      fsendfile.c ifconfig.c lfile.c makepath.c pidfile.c pidfilefn.c		\
-		      progress.c reallocarray.c rsync.c strlcpy.c strlcat.c strtonum.c		\
-		      tempfile.c tree.c which.c
-
-libite_la_CPPFLAGS  = -D_GNU_SOURCE
-libite_la_CFLAGS    = -W -Wall -Wextra
-libite_la_LDFLAGS   = $(AM_LDFLAGS) -version-info 4:1:0
-
-pkgconfigdir        = $(libdir)/pkgconfig
-pkgconfig_DATA      = libite.pc
 doc_DATA            = README.md LICENSE
 EXTRA_DIST          = README.md LICENSE ChangeLog.md
-SUBDIRS             = tests
+pkgconfigdir        = $(libdir)/pkgconfig
+pkgconfig_DATA      = libite.pc
+SUBDIRS             = src tests
 
 ## Generate .deb package
 package: