v2.12

• Vagrant base box updated to Debian 10 (buster)
• Changing the way metadata is collected, adapting to codemetapy 0.3, making it easier to regenerate metadata, and removing some complexity
• Added piereling (and installing poppler and pandoc by default)
• Allowing quicker updates with the lamachine-update --only parameter no longer process all dependencies if it is set
• Remove labirinto sources before update because it often fails to upgrade nicely
• Allow LaMachine to build against a custom Python 3, by setting python_bin and pip_bin (building the custom Python is not included in LaMachine) #159
• Fixes for Arch Linux #161
• adding hdf5 to base packages (required by keras)
• adding new translitteration service (t2t)
• Various smaller fixes