Merge branch 'release-0.9.1' into develop
Changed version.
Refactoring: move up request/response class.
Refactoring: move up error class.
Improved version update.
Added exception message to error response.
Data error default must be null.
Use composer autoload.
CS.
Initialize [draft] annotation (filter/security/plugin).
Refactoring: annotation parser + plugins.
Added composer install (travis).
Merge branch 'feature-annotation' into develop
Changed external optional dependencies as "suggest".
Added --dev (composer install).
Improved variable name.
Added example rpc log file.
Updated version number to 0.10.0.
Merge branch 'release-0.10.0'