* we cannot use weak symbols in MinGW, so we avoid init_priority for symbol
   initialization by compiling the empty definitions into
   sciteco-minimal but the real ones into sciteco
   (had to add new file symbols-minimal.cpp)
 * this fixes compilation/linking on LLVM Clang AND Dragonegg
   since their init_priority attribute is broken!
   this will likely be fixed in the near future but broken versions
   will be around for some time

 * will be useful for Windows builds since Windows users usally do not have
   a man-page formatter/reader

 * the language reference is a manually written man-page template
 * containing special references for generated documentation (\#$...)
 * SciTECO script generate-docs.tes extracts TECO comments (/*$ ... */)
   from all source files and transforms them to Troff requests that are
   inserted into the document template.
 * TECO doc comments are a rather sophisticated markup:
   * first part until empty line is called header: simplified command syntax descriptions
   * the rest is called body: <identifier> is automatically underlined,
     empty lines generate new paragraphs, lines beginning with "-" or numbers
     denote an indented unordered or numbered list item.
   * regular Troff requests/macros can be used for more sophisticated markup
   * since Autoconf substitutions are performed on the generated man-page,
     @VARIABLEs@ may be used in doc comments as well

 * solely for generating developer docs
 * disabled by default even if Doxygen is installed
 * Doxygen comments are not used currently

 * pkg-config LIBS should be added to $LIBS so that link order is correct

later there will be much more documentation

 * lexer config is now in separate file installed into the package data dir,
   so it can be excluded from the teco.ini template.
 * teco.ini is generated so it can load an installed lexer.tes as ED hook
   (can still be dropped into the user's home and will work immediately)

language and commands will be described in separate documents