Add Timer class

This class is used to call a callback function
when the timer expires.  It can be one shot, or repeating.

Copied from the phosphor-fan-presence repository.

Change-Id: I9d63c2e6fd550286a2a5360e1e8d13f6a3c25923
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..7a2f09b
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,32 @@
+# Initialization
+AC_PREREQ([2.69])
+AC_INIT([witherspoon-pfault-analysis], [1.0],
+[https://github.com/openbmc/witherspoon-pfault-analysis/issues])
+AC_LANG([C++])
+AC_CONFIG_HEADERS([config.h])
+AM_INIT_AUTOMAKE([subdir-objects -Wall -Werror foreign dist-xz])
+AM_SILENT_RULES([yes])
+
+# Checks for programs.
+AC_PROG_CXX
+AM_PROG_AR
+AC_PROG_INSTALL
+AC_PROG_MAKE_SET
+
+# Checks for typedefs, structures, and compiler characteristics.
+AX_CXX_COMPILE_STDCXX_14([noext])
+AX_APPEND_COMPILE_FLAGS([-Wall -Werror], [CXXFLAGS])
+
+PKG_CHECK_MODULES([SDBUSPLUS], [sdbusplus],,
+    AC_MSG_ERROR(["Requires sdbusplus package."]))
+PKG_CHECK_MODULES([PHOSPHOR_LOGGING], [phosphor-logging],,\
+    AC_MSG_ERROR(["Requires phosphor-logging package."]))
+PKG_CHECK_MODULES([PHOSPHOR_DBUS_INTERFACES], [phosphor-dbus-interfaces],,\
+    AC_MSG_ERROR(["Requires phosphor-dbus-interfaces package."]))
+
+# Checks for library functions.
+LT_INIT # Required for systemd linking
+
+# Create configured output
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT