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add suppot for limit/offset to all all() methods
watcher_user_ids support
fixes missing tracker::getIdByName()
fix http query building for nested arrays
fix edit issue method not compatible with custom_fields
add issue custom_fields handing + fix casting bug (Project+Version api)
fixes listing() methods for Project and Version
add some missing entry points + add optional GET params attributes + minor refactoring
add support for groups, issue relationships, project memberships
possibility to set port number and ssl certificate check
make connection's port number dynamic