Remove plugins before copying them again.

This way plugins can rename/delete files w/o having old files lying around.
Only delete core plugins.
Add details on how to use wildcard ssls

After reading the source code for hints on how to deploy wildcard ssls I found it was already supported.

The proposed change should make this feature easier to find.
s/ssl/TLS/g + domain name must match for wildcards

* Updated ssl to TLS as requested.
* Added information that names must match
Merge pull request #516 from eitland/patch-1

Add details on how to use wildcard ssls
Adding note re: pushing to master for deployments.
Use listen 443 ssl instead of ssl on in vhost conf file
Factor common SSL settings out to the http block
Allow symlinks for SSL cert detection in nginx-vhosts post-deploy
Implement nginx spdy support
Update the TLS documentation for how to enable and for SPDY support
Change cert folder name from ssl to tls
Add note about HSTS header to README
CHANGED use namespace dokku for docker 0.10 compatibility
Merge pull request #535 from assaf/docker-0.10

CHANGED use namespace dokku for docker 0.10 compatibility
Merge pull request #522 from wingrunr21/improve_ssl_support

Improve SSL support and implement SPDY
Merge pull request #521 from ElliotChong/patch-1

Adding note re: pushing to master for deployments.
Update stable's version
if dokku.conf has not been created, create it
double brackets