init bitcoin commiter module

[zhouop0]

Closes: #26

Description

init bitcoin commiter module

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For contributor use:

• [ ] Targeted PR against correct branch (see CONTRIBUTING.md)
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Code follows the module structure standards.
• [ ] Wrote unit and integration tests
• [ ] Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• [ ] Added relevant godoc comments.
• [ ] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• [ ] Re-reviewed Files changed in the Github PR explorer

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For admin use:

• [ ] Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• [ ] Reviewers assigned
• [ ] Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[oxf71]

fix lint reference https://github.com/b2network/b2-node/pull/27/commits/a9cda428ef92fec52e7023f3f849b10a98a3e515 https://github.com/b2network/b2-node/pull/27/commits/e5df0c7f79381aa8fb9b36540033412233ae5017 https://github.com/b2network/b2-node/pull/27/commits/a9cda428ef92fec52e7023f3f849b10a98a3e515

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