Change files.txt symbol on the baksmali'd apks from "~" to "@"

Originally, all *apk files were decompiled with apktool. I added the ability
to decompile apks using baksmali binary instead, by prefacing the apk file
with a tilde (in the files.txt). However...

Cygwin was using shell expansion on the tilde and looking for the Mms file
in the home directory. So I have used a(n unfortunately unrelated) new symbol.
Now the question becomes, was this latest "disappearing" Mms.apk fix fools gold,
 since they may just have seen their original in the app drawer. Argggggh.
Merge branch 'master' of https://github.com/mateor/auto-patcher