Fix Composer version check

I've seen this for a few versions of VVV that in both Ubuntu 12.04 and 14.04 the below line of code would always evaluate to false, and as such, always install Composer instead of checking for an update:
```bash
if [[ -n "$(composer --version | grep -q 'Composer version')" ]]; then
```

I propose using the following, which seems to evaluate more consistently:
```bash
if [[ -n "$(composer --version --no-ansi | grep 'Composer version')" ]]; then
```
Fix typo concerning paths
Fix typo in file path.
Instruct Curl to follow 302 redirect for Wordpress source files
Merge pull request #450 from jmbarlow/curl-fix

Instruct Curl to follow 302 redirect for WordPress source files
Use HTTPS when downloading the latest WordPress package

See #350

"libcurl performs peer SSL certificate verification by default"
http://curl.haxx.se/docs/sslcerts.html

This is better practice and eliminates the current redirect from
HTTP to HTTPS. We'll leave the `-L` flag, as future redirects are
possible.

Thanks @nacin
Merge pull request #452 from Varying-Vagrant-Vagrants/https-wp

Use HTTPS when downloading the latest WordPress package
Merge pull request #421 from nacin/patch-1

Fix typo in file path
Merge pull request #400 from thewebists/patch-1

Fix Composer version check
Merge pull request #418 from iparr/master

Fix typo concerning paths
Update the list of contributors
Add network config info for host local IP address

By default, the guest machine is accessed by the host machine via
192.168.50.4.  Instead, we want to make the guest machine accessible
from the host machine's IP address.  This will allow us to access the
guest machine from other devices on the network (e.g. a smart phone)
Add wildcard Nginx rules to load default VVV domains via xip.io

local.wordpress.*.xip.io
local.wordpress-trunk.*.xip.io
src.wordpress-develop.*.xip.io
build.wordpress-develop.*.xip.io
where * represents an IP address

The goal of these rules is to allow other devices on your network to
load these websites using URLs like the following
local.wordpress.192.168.1.10.xip.io
local.wordpress.10.0.1.20.xip.io

See #263
change network setting to local IP:8080

Change guest machine network IP to host local IP on port 8080
update default page urls to xip.io
add port forwarding commands as vagrant triggers

When running on your host machine's local IP address it is
necessary to port forward 80 to 8080.  (When assigning a port to your
guest machine it must be larger than 1024, therefore we port forward
on the host machine so we can use the appropriate port).
Rather than setup and remove port forwarding
each time, I've added the commands as vagrant triggers.

Note: this requires the Vagrant triggers add-on to be in place
https://github.com/emyl/vagrant-triggers

More information at
http://salferrarello.com/vagrant-vvv-setup-wordpress/
and
https://github.com/Varying-Vagrant-Vagrants/VVV/issues/442