juise-3.0.0

• add and tags to context
• add a .prefix link for "xnm" namespace
• add new readthedocs conf file
• add ssh-option (#7)
• add stdlib.h
• set ELT_HOST_NAME using opt_target in context
• avoid vfork()
• change local options
• deprecate oxtradoc docs
• don't upload docs
• massive rework of options to use getopt_long, enabling normal/save argument parsing
• move docs to sphinx/rst
• move to PKG_CONFIG macros (#5)
• move to Sphinx/RST
• autoupdate configure files
• remove AC_STDC_HEADERS
• remove dampen(), since it's in libslax now
• update test files