Add Boards Manager install support

[per1234]

• Boards Manager install URL for testing: https://raw.githubusercontent.com/per1234/HoodLoader2/per1234-boards-manager-support-test/package_NicoHood_HoodLoader2_index.json This is a temporary implementation and is only to be used for initial testing.
• You must add the file: https://github.com/per1234/HoodLoader2/releases/download/2.0.4/2.0.4-boards_manager.zip to your release 2.0.4.
• Your Boards Manager install URL: https://raw.githubusercontent.com/NicoHood/HoodLoader2/master/package_NicoHood_HoodLoader2_index.json You may want to add it to the installation section of your wiki, https://github.com/arduino/Arduino/wiki/Unofficial-list-of-3rd-party-boards-support-urls, and http://playground.arduino.cc/Main/ArduinoCoreHardware#Bootloader

[NicoHood]

Thanks again!

[per1234]

You're welcome. Let me know if you release a new version and want me to add it to the JSON index.

[NicoHood]

Would you please be so kind to check this?
#10 (comment)

[per1234]

I hadn't noticed before that HoodLoader2 requires the HID core because I already had it installed. I'm thinking it would be better to add HID-Project to this JSON file so that both of them will be available for install in the Boards Manager by adding only one URL to preferences. I'm happy to add it in and submit another pull request, just let me know if you want me to proceed.

[NicoHood]

Nah.
What if people install HID project and HL2 which includes the HID Project once more?

Its fine right now

[per1234]

What if people install HID project and HL2 which includes the HID Project once more?

You could just use the same Boards manager URL for both projects and then that wouldn't be a problem. I agree it works fine as it is though.

[NicoHood]

No thanks.

[NicoHood]

Are you able to add this for the 2.0.5 branch as well? Do I first need to push it to master?
https://github.com/NicoHood/HoodLoader2/tree/dev_205

[per1234]

Are you able to add this for the 2.0.5 branch as well?

Pull request submitted.