Tags: liqunx/HL7

Added MSA segment class for better creating and parsing ACK messages

Fixed issue where toString(true) always uses \n irrespective of custo…

…m segment separators

Added documentation on how to define custom configurations in Message() constructor

Fixed line-ending issue while sending HL7 to remote

Changed $port argument type as int (from string)

Added ability to keep empty sub-fields

Added custom exceptions

Added getter methods for all available segments

Add field-specific getters and setters

Connection Class: Add exceptions, Documentation

Update install instruction in README