Initial Download manager

This is the basic download manager that implements
xyz/openbmc_project/Common/TFTP.interface.yaml

Change-Id: I429b0f2fbce3864dee5051af727b88b3a3fe1227
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/.gitignore b/.gitignore
index 7f0412d..6b00353 100644
--- a/.gitignore
+++ b/.gitignore
@@ -42,6 +42,7 @@
 /config.log
 /config.status
 /phosphor-version-software-manager
+/phosphor-download-manager
 Makefile
 .deps
 *-libtool