rusted_cypher 0.6.0

# 0.6

  - BC: Changed `Transaction<Started>` api to match `Cypher` and `CypherQuery`
    - `Transaction<Started>::send` executes multiple queries like `CypherQuery::send`
    - `Transaction<Started>::exec` executes a single query like `Cypher::exec`
  - Refactored tests for `cypher/mod.rs` and `cypher/transaction.rs`

# 0.5

  - Changed crate name to `rusted-cypher`.
  - Added integration tests.
  - BC: `Cypher::exec` returns single `CypherResult` instead of `Vec<CypherResult>`

# 0.4.1

  - Updated `serde_macros` and `serde_codegen` to version 0.6.
  - Added `log` support.
  - README.md generated by [cargo-readme](https://www.github.com/livioribeiro/cargo-readme)

# 0.4

  - Refactored `cypher` module. Code from `cypher.rs` is now at `cypher/mod.rs`.
  - Added `CypherResult::rows` to iterate over results.
  - Added builder pattern for creating statements with parameters.
  - Added builder pattern for creating transaction with statements.

# 0.3

  - Refactored of `statement` module.
  - Implemented `From<&str> for Statement`.

# 0.2

  - Added `transaction` module.