Fix typo in readme.md (there is no "build-essentials" package in Debian)
Fix typo in readme.md (there is no "build-essentials" package in Debian)

russpowers/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,tulayang/Nim,dom96/Nim,russpowers/Nim,tulayang/Nim,dom96/Nim,tulayang/Nim,tulayang/Nim,dom96/Nim,tulayang/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,tulayang/Nim,russpowers/Nim,dom96/Nim