prebump to 0.7.9 build number, though not doing a release yet...

Because I want to pick a min build number for 'BLE OTA update allowed'

bin/version.sh

@@ -1,3 +1,3 @@
 
 
-export VERSION=0.7.8
+export VERSION=0.7.9

docs/software/TODO.md

@@ -2,6 +2,7 @@
 
 You probably don't care about this section - skip to the next one.
 
+- check BLE handle stability across sleep - stress test sleep/wake
 - test BLE software update again
 - @feh123 Sony Xperia Z1 C6903 running Android 5.1.1
 - first message sent is still doubled for some people