More fixes, drop table merger

Changes:

• Added a drop table merger
• Attempt to use system 7z on Linux
• Added folder handling for cross-platform install

Bugfixes:

• Fix error on no AAMP diffs
• Fix gamedata diff performance
• Fix UI crash if advanced options not closed

New settings and fixes

• Add setting to use custom BCML data folder for mods and backups
• Add setting to disable hard link export
• Fix logging to improve performance
• Misc minor bugfixes and improvements

1-click, new deep merge, etc.

Lots of changes in this beta, which could well be the last before stable release.

• Implemented GameBanana 1-click support and BNP file handler
• Rewrote AAMP merging from scratch using oead
• Fixed map diffing for Switch users
• Misc UX improvements

Too many fixes

Honestly, I've fixed so many little bits in this I can't do a useful changelog except to say that Switch mods can now drop atmosphere/contents and just use TITLEID/romfs.

Smoothing the beta

This releases fixes a couple issues from the beta so far:

• The Update BCML feature should work, and is now the preferred way to update for both pip and the executable setup installs
• Fixed enabling and disabling mods
• RSTB estimates for AAMP files on Switch should be more reliable
• Minor fix to dependencies and the bcml-debug command
• RSTB merging may perform better
• Fixed some minor UI bugs like dialogs with nonfunctional close buttons

Updated beta

Correct some initial bugs, particularly with saving files, and also adds completely separate folder settings for Wii U and Switch

First public beta BCML 3

Too many changes to document for just the beta; I'll do a real writeup for the proper release. In the meantime, try it out and check Discord for my help.

The glories of RSTB estimation

This release makes significant improvements to the RSTB estimation feature for AAMP and BFRES files. Because it is now at least 99.99% reliable, it is enabled by default.

RSTB fix

Fixes the last of the float/int-related RSTB bugs

Hotfix

Fixed an issue introduced in 2.7.5 that would throw an error on installing most mods.