Replace wget with curl

To prevent certificate errors. (Debian Wheezy, Squeeze)
Merge pull request #4 from AladW/patch-1

Replace wget with curl
dnscrypt user unable to chroot

While making a few changes to my network, I've noticed DNSCrypt hasn't been run for three days. 

Launching it via /etc/init.d/dnscrypt-proxy or dnscrypt-proxy -d -u dnscrypt gave no errors, but no launched process either. 

/var/log/daemon.log

```Apr  8 02:29:43 arbellen dnscrypt-proxy[2112]: Generating a new key pair
Apr  8 02:29:43 arbellen dnscrypt-proxy[2112]: Done
Apr  8 02:29:44 arbellen dnscrypt-proxy[2112]: Unable to chroot to [/var/run/dnscrypt]```

ls -l /var/run

```lrwxrwxrwx 1 root root 4 apr  6 20:12 /var/run -> /run```

Deleting the user and making a new one with a /run home made it work again. I've also replaced useradd with adduser (man useradd mentions to) and added some safety checks (/bin/false, disabled pw/login)
dnscrypt unable to chroot
dnscrypt unable to chroot
Update dnscrypt-autoinstall.sh
/etc/dnscrypt/run home
Update dnscrypt-autoinstall.sh
Merge pull request #5 from AladW/patch-1

dnscrypt user unable to chroot
Change dnscrypt version
Update initscript-opendns.sh

Added OpenDNS Address, PNAME and PKEY values
Update initscript-opendns.sh

Added -R option for OpenDNS
Update initscript-opendns.sh
Merge pull request #7 from theodorerambert/patch-1

Update initscript-opendns.sh
Update README.md
Update dnscrypt-autoinstall.sh
Added GPG verification

Verifies the signature of the source code.

Added two functions: import_gpgkey & verify_sig
Merge pull request #11 from theodorerambert/patch-2

Added GPG verification
Merge pull request #8 from glitsj16/master

Corrected 2 spelling errors
Update dnscrypt-autoinstall.sh

github now uses a redirect, so curl only loads the initscripts with -L

http://curl.haxx.se/docs/faq.html#How_do_I_tell_curl_to_follow_HTT