Tested and working in hardware

84: bump version to v0.7.0 r=Disasm a=almindor



Co-authored-by: Ales Katona <ales@katona.me>

83: update bare-metal and remove Nr trait r=Disasm a=almindor



Co-authored-by: Ales Katona <ales@katona.me>

80: add support for mprv r=almindor a=jwnhy



Co-authored-by: john <799433746@qq.com>
Co-authored-by: John Weston <18240025+jwnhy@users.noreply.github.com>

82: use --target in CI checks r=Disasm a=almindor



Co-authored-by: Ales Katona <ales@katona.me>

81: remove unused ci scripts r=Disasm a=almindor



Co-authored-by: Ales Katona <ales@katona.me>

73: Add additional binaries for floating-point ABIs r=Disasm a=TechnoElf

Fixes #69

Co-authored-by: TechnoElf <technoelf@undertheprinter.com>

79: Switch CI to Github Actions r=Disasm a=almindor



Co-authored-by: Ales Katona <ales@katona.me>

70: Add docs.rs document build metadata for build targets r=Disasm a=luojia65

This pull request changes build targets when build documents on `docs.rs`, it will show RISC-V targets other than default x86 targets.

Before:

![image](https://user-images.githubusercontent.com/40385009/116803431-2add2e00-ab4a-11eb-87ea-b1cd204299d2.png)

After (take `rustsbi` crate as example): 

![image](https://user-images.githubusercontent.com/40385009/116803427-2284f300-ab4a-11eb-8974-24126cbc4310.png

)



Co-authored-by: luojia65 <me@luojia.cc>