curl_downloader_module:
		basic data transfer handling (now able to save file, still need a lot of validation)
		some tracing code

this may be called first working prototype with vary basic functionality implemented.

currently udm have working server, working qt client and able to download url via curl module (most of additional events like
download progress currently not
implemented, code need lots of sanity checks and exception handling)

	download completed state
client-qt:
	added "download completed" subscription and status support
server:
	module_curl:
		used events api in core for download state changes
	core:
		download completed event support for modules

updated copyrights (new year)
server:
	started implementation of api for module events (module should be able to fire event which will be delivered to clients which have subscribed for this event type)

	implemented handler for SERVER_DOWNLOAD_INFO_REPLY

server:
	api:
		removed core_id field from download_internal_s as it always used for index in download map
		some useful coments
	core:
		improoved signal handler a bit
		fiexd bug in core_api metadata related functions (metadata_set, metadata_get, metadata_remove), now thay returning correct data
		basic implementation of CLIENT_DOWNLOAD_ADD handler
		basic implementation of module unloading
	curl_downloader_module:
		implemented metadata storing
		some sanity checks
		curl_download structure refactored a bit (simplification)

	use int for parameters id everywhere

	use int32 instead of strings for id's in structures
server:
	curl module:
			work in progress