docker: images optimisation: - reduced the number of layers by grouping many instructions - moved stuff which don't change a lot at the beginning, and hg/apt at the end - scripts are not now in scripts/ subdirectories - prosody.cfg.lua is added using ADD instead of getting it online - .hg/dirstate is copied in base (backend) and libervia, so mercurial revision is known - removed lot of useless WORKDIR instruction, they are replaced by "cd" inside RUN instructions - cleaning (apt-clean, rm) is done on the same instruction as the one than generate the data, to avoid useless data in layers

# Font Squirrel Font-face Generator Configuration File
# Upload this file to the generator to recreate the settings
# you used to create these fonts.

{"mode":"easy","formats":["ttf","eot","woff","svg"],"options_hinting":"Y","options_vertical_metrics":"Y","options_kerning":"Y","options_subset":"basic","subset_custom":"","subset_custom_range":"","css_format":"fontspring","filename_suffix":"webfont","emsquare":"2048","spacing_adjustment":"0"}