version 0.1.6 changes:

    made refactoring of module interaction:
	parse syntax of tags definition and template tags moved to lexer
	tag registration function moved to tags module
	core module will be used to initialize web engine, cache, configuration etc
switch off debug, move use of tags modules into template
add init for core module, init context from input parameters, parse query_string
change core, add parse and set cookies
version 0.1.6 changes

	core module
		add initialization of upload parameters, cookies and files
		separate inititalization and upload

	upload
		for file upload read content by chunks of 64kB and save in memory while file size less then 1Mb,
		when file size great then 1Mb save it in tmp directory
		upload delete files which dos not moved by application, e.i upload move function have not been called

	fixes
		for module, check hash by reftype (Sys::Utils) function instead of build in ref function
add switch tag