wget dependency checking

Adds check for wget submitted in PR #3

Improved Version Detection and Removed curl Dependancy

• Corrects error on macOS with default awk when detecting latest version
• Switched to wget instead of curl throughout, removing curl as a dependency
• Fixed spelling & adjusted help message

Enhance CPU Architecture Detection

CPU Architecture Detection Algorithm Enhanced

• new common algorithm that works across deb and rpm distros
• uses lscpu results to determine CPU Arch if possible
• as a fallback it searches the flags in /proc/cpuinfo to determine Arch
• if arch is an arm variant, changes to just "arm" for proper function in Terraform download URL

Add Option for Deterministic Sudo Install

Added parameter and variable to allow script to run without prompting for install destination

• -a parameter specifies to always use sudo to install to /usr/local/bin
• This can be set as default by uncommenting line 14 to set sudoInstall=true
• user may need to enter sudo password unless password-less sudo is enabled

Initial Public Release

Initial Release of Terraform Installation Script