Refactor detect browser list

[mitchhentges]

The map of browsers currently has each key represent a potential command on Linux to detect the browser. However, since different package managers call the browsers different names, there become duplicate values in the browsers map with different keys: see chromium and chromium-browser.

Instead, each key should be the browser name, and there should be an array: commands with the list of potential names for the browser name.

[mitchhentges]

This will also remove the need for winDetectMap

[mitchhentges]

Closed by #18