iks: added storing config from iks-server.ini in iks-server

+ only values not belonging to any section are stored as config (excludes locations)
iks: server config as a property of server, not resource

+ added config_container to solve cyclic dependencies
+ new command get_server_options, can be sent to the proxy before connecting to resource
BUGFIX: filler is unable to write data (string encoding problem)

* filler.py script encoded parameter string in ISO-8859-2, which did not
  work with szbwriter after changes in encoding conversions (see commits
  159add0d4 and dab3bdd8s).

* changed files' encodings to UTF-8.
Removed/replaced deprecated function calls from Filler

From 'wx' module:
* PySimpleApp() was replaced by App(),
* InitAllImageHandlers() is deprecated and can be safely removed.
Full parameter name in parameter search list

* added full parameter name (*:*:*) to parameter search list.
BUGFIX #121: change font color to white for dark colors in info widget

* font color (black or white) in parameter info widget now depends on
  background brightness.
draw3: set dark color treshold to be consistent with idraw
iks: send error with cmd_id in unknown command

+ in case of unknown command, error is send with used command id in
  response, not with 0
iks: moved xml-related param code to from_xml initialisation
Confirm exit in SCC

* added "do you want to close the application?" dialog in SCC.
scc: update SCC desktop entry

* fixed link to Szarp icon in desktop entry file.
* include SCC entry in desktop environment's menu.
Filler 2 - new tool for manual szbase filling

* a couple of template files and Makefile.
scc: SCC desktop entry symbolic link fix
scc: SCC desktop entry symbolic link fix (v2)
filler2: add gettext support

* added and tested Polish translation using gettext.
filler2: added menubar and default dialogs

* added menubar with "File" and "Help" menus.
* added "About" dialog.
boruta_modbus: fixed encoding handling in log msgs
boruta_modbus - unified decimal2 and decima3 api
boruta_modbus: decimal2 and decima3 fixes

* Working version of decimal2 and decimal3 after
some cleanup and testing.
Merge current stable version: 3.14.12