Create the initFull() function to initialize in Full library mode in order to improve tree-shaking

## Motivation

Importing `init()` makes bundlers bundle the `LocationFull` class, effectively not needed.

## Proposal

Remove the `full: boolean` option from the `init()` function's options and let people specifically import the new `initFull()` function to initialize the library in full library mode.  This should address the tree-shaking issue.