This allows users to "map" (or "link") symbols with different names so that they can be compared without having to update either the target or base objects. Symbol mappings are persisted in objdiff.json, so generators will need to ensure that they're preserved when updating. (Example: d1334bb79e)
Resolves#117
* Basic integration
* Implement basic right click option
Needs lotsa work
* nothing to worry about
* Convert extab diff to separate view
* Make clippy and fmt shut up
* Make clippy fmt shut up for real this time
* Print extab/extabindex symbol names in extab view
* I hate fmt
* Basic integration
* Implement basic right click option
Needs lotsa work
* nothing to worry about
* Convert extab diff to separate view
* Make clippy and fmt shut up
* Make clippy fmt shut up for real this time
* Print extab/extabindex symbol names in extab view
* I hate fmt
* Fix scroll position not being maintained from extab view
* Silly me
* Add rlwinm decoder window
* Remove extra files
* Create Cargo.lock
* Show extab symbol names in hover window
* Appease fmt
* Update symbol_diff.rs
* Update symbol_diff.rs
* Get extab symbol from extabindex relocations instead
* Update Cargo.lock
* Update Cargo.lock
