B3 1.10.4 - Beta Release

This release fixes some minor issue discovered in B3 1.10.3 beta and carries some minor performance improvements. Here is the changelog since B3 1.10.3 beta:

• fixed invalid log message in makeroom plugin.
• added getSetting method in Plugin class: now it's easier and faster for plugin developers to load configuration file values (usage implemented already in some built-in plugins).
• adjust publist plugin to submit b3 platform + architecture to master server.
• changed default configuration file to use @b3/conf instead of @conf token: this allow end users to load configuration files from different locations than B3 conf directory, while referring to this directory for plugins configuration files (by default).
• some minor optimization in tk and spawnkill plugins.