Measure the size of flash-loader.bin

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 2064f33..50ce269 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -63,6 +63,9 @@
           zip

       install:

         - python3 -m pip install bitstring construct

+      after_success:

+        - curl -O https://raw.githubusercontent.com/danvk/travis-weigh-in/adcc3a3e5bc16b360aa379d0fc23c3a6e1d9b21d/weigh_in.py

+        - python weigh_in.py firmware/flash-loader/flash-loader.bin

       before_deploy:

         - make install

         - tar -zcf ${RELEASE_FILE}.tar.gz bin/