[doxyrest_lua] remove common space prefix from documentation
[doxyrest_lua] remove common space prefix from documentation

this is important if we use \verbatim tags in doxy comments (which in turn is
needed to preserve reStructuredText indentation where necessary)

also, translate <bold> doc blocks to ** and <italic> to *

vovkos/doxyrest,vovkos/doxyrest,vovkos/doxyrest,vovkos/doxyrest,vovkos/doxyrest