Improve install scripts

[rileyhawk1417]

• The suggestion is to optimise installation files and avoid repeating code in several places.
• This can make it easier for people who want to try & compile from source code.

Detailed Description

• To improve the maintenance of the installation files & avoiding repetition of code in the process.

Context

This can benefit contributors who may have knowledge about different systems and want to
modify the code specifically for that system. For example in Linux there can be different scripts
that are for Ubuntu, Arch & Fedora based systems.
This is useful as the commands & packages for the above systems are not the same.

Possible Implementation

• Migrating commonly used functions & values to one file then call them when needed.
• Have individual files for systems such as Ubuntu, Debian, Arch, Fedora.

• Version used:
• Environment name and version (e.g. PHP 5.4 on nginx 1.9.1):
• Server type and version:
• Operating System and version:
• Link to your project:
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