I had some trouble with the registration..
Quickly checked TextSecure Server API and found the problems:
number has to be valid PSTN. (Including regionCode, precisely what validateNumber() returns)
verificationCode has to be all numbers, no dashes or spaces
Closes#193
When first intalling, users will no longer be presented with the option
to register as a standalone client.
For developer convenience, the standalone form can still be found at
chrome-extension://.../register.html
Closes#159
