Merge pull request #176 from wycomco/wip

Fixed migration script for sqlite databases
Add a CACHEDIR variable to the installer, such that MUNKIDIR can be safely customized
Add command line options to installer script
Fix coding-style, use tabs instead of spaces
Add a switch to turn off preflight
Add -h (help) flag to install script
Ensure that destination directories exist before attempting to download files
Merge pull request #184 from wycomco/wip

Translated English locale to German
Merge pull request #183 from znerol/feature/wip/cli-installer

CLI installer
Add installer option