Relocate source fiiles to src/ subdirectory

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

src/Makefile.am

@@ -0,0 +1,14 @@
+lib_LTLIBRARIES     = libuev.la
+libuev_la_SOURCES   = uev.c io.c timer.c signal.c cron.c
+libuev_la_CPPFLAGS  = -D_GNU_SOURCE -D_TIME_BITS=64
+libuev_la_CFLAGS    = -W -Wall -Wextra
+libuev_la_LDFLAGS   = $(AM_LDFLAGS) -version-info 1:2:0
+
+noinst_PROGRAMS     = bench
+bench_CPPFLAGS      = -D_GNU_SOURCE
+bench_LDADD         = libuev.la
+
+pkgconfigdir        = $(libdir)/pkgconfig
+pkgincludedir       = $(includedir)/uev
+pkgconfig_DATA      = libuev.pc
+pkginclude_HEADERS  = uev.h private.h queue.h