readme: clarify installation instructions

[David-Guillot]

• ADB commands directly as Shell snippets
• Move Nougat to a separate case, since the KK/L/M procedure doesn't work

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This change is 

[ale5000-git]

It isn't true, the procedure for Nougat is the same as for other, there are just additional steps but the base is the same.

[David-Guillot]

The additional step you referring to (which i suppose is to apply the signature patch) is:

• neither properly documented (i just don't know what to type on my keyboard)
• nor acceptable from my perspective since Nougat is about to become the most widely used version of Android (and is probably already the most used AOSP version in the community of people installing custom ROMs) ; IMHO the most used version is supposed to be the rule, not the exception that you handle with a patch

This is why i decided to go for a manual ADB install (which is slightly different from KK/L/M because you apparently have to put the APK in a subfolder of priv-app, but i'm not sure about that, i read that on some blog posts), and then to share my experience through this README ;)

[ale5000-git]

L and M is the same of N regarding the folder.

[JonnyTech]

To confirm, placing the file at /system/priv-app/microg.apk works on L, M, N and O.

[ale5000-git]

It works but it is only for compatibility I think.
Since Lollipop the structure is changed and who know for how much time the old structure will still work.

[David-Guillot]

Thanks @ale5000-git for the clarifications about the subfolder thing, i was not really sure.

@mar-v-in , what do you think about all this?

[mar-v-in]

I guess it's better to use adb remount instead of adb mount /system, no?

[ale5000-git]

I haven't tried but I don't think adb mount /system is even working, bwt too much separation will lead to more errors when it need to be updated.
This evening I will see if I can make it more clear for all Android versions.

[David-Guillot]

Actually i replaced adb remount by adb mount /system because the former was not working with my configuration (Nougat, ADB from recovery). adb root && adb remount did not mount /system.

[ale5000-git]

I think it should be adb shell mount /system (instead of adb mount /system), bwt remount doesn't mount as read-write if not already mounted (as read-only or read-write) as mount doesn't remount as read-write (if it was read-only).

The command depend of what is needed.

[ale5000-git]

What do you think of this change? #147

[David-Guillot]

Actually @ale5000-git i don't really understand why you created another PR for this 😕. If some things don't seem clear enough in mine, i can fix it...

[ale5000-git]

Because I have taken a completely different approach; I have still credited you in the message

[David-Guillot]

Closing this as #147 seems more relevant, and the project doesn't seem maintained (i'm just cleaning up my Github :P ). Thanks @ale5000-git for credit in your PR ;)