cp_api 0.1.4

Check Point API library
# v0.1.4

- Added a `Custom` value for generic errors.
- Updated examples using this new value.
- Updated error while running a query.

# v0.1.3

- Changed missed if expressions to use is_empty instead of "".
- Added readme to Cargo.toml.
- Added tests.

# v0.1.2

- Changed logout function to use clear method on the sid.
- Changed logout in Drop to check using is_empty on the sid.
- Fixed wrong header value.

# v0.1.1

- Changed `&'static str` Client values to `String` due to lifetimes.
- Fixed incorrect accept_invalid_certs value in Client `Debug` formatter.

# v0.1.0

- First release