Sails-RS v0.7.0

What's Changed

• fix(ffi): unify c_char ptr cast by @breathx in #648
• feat(macros): allow to define multiple services within the same module and services with the same name in other modules by @vobradovich in #660
• build(deps): bump up Gear crates to 1.7.0 by @DennisInSky in #683

Full Changelog: rs/v0.6.2...rs/v0.7.0