Add package for ScrollZ IRC client

This adds ScrollZ 2.3 as a package. There's currently no IRC client package available for Chromebrew, and while e.g. EPIC may be more popular, ScrollZ has been a favorite since the 90s. This latest version 2.3 has been released earlier this year. Tested successfully on a Samsung Series 3 (ARM) Chromebook.

(UPDATE) JDK8 armv7l binary.

Fix libpng url

Fixes #233 

skip tests because at least one test wants to write to /

add unzip package

(UPDATE) README - Remove "Does not support arm chipsets yet" and replace with a table.

Added sha256 of arm ruby to install.sh script

(UPDATE) Nano to 2.7.1

(UPDATE/FIX) JDK8

(UPDATE) GO to 1.7.4

(UPDATE) HTOP to 2.0.2

(UPDATE) NGINX Change stopnginx to run "sudo nginx -s quit" instead of "sudo pkill nginx"

(FIX) Checksum Mismatch on PCRE

ARM support (tested on c100pa)

upstream code isn't maintained any more, many distros have unofficial
patch sets, so we use the full ubuntu patch set.  Includes several
security vulnerabilities

Make symbolic link between /usr/local/nginx/sbin/nginx and /usr/local/bin/nginx be forced otherwise it fails.

Probably copy/pasted wrong.

stopnginx now stops nginx gracefully instead of just killing the process.

Changed url and sha1 and crew package version number