v0.9.6

new features:

• gop fmt
• gop go: support -debug switch
• gop run: support args
• gop run go files (means we don't compile them but check dependencies because they may import Go+ packages)
• support external types (import packages and use types defined in them)
• binary operators: LAnd(&&), LOr(||) and LNot(!)
• member access: support embedded fields of struct

changes:

• support codecov (coverage report)
• rewrite README.md