add .yardopts. It is here only as markdown to html convertor
Merge remote-tracking branch 'origin/master' into improve_doc
initial doc for few agents
update gitignore
remove already converted agents
finish first draft of system agent documentation
adapt to review
more doc improvements
Merge pull request #80 from yast/improve_doc

Improve doc
build
fixed a signedness warning

warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
removed useless libraries and their warnings

link: warning: `-version-info/-version-number' is ignored for convenience libraries

liby2foo was formerly linked to y2base,
but nowadays libpy2foo (p for plugin) is dlopen'd