add localization to time strings in DebugVariablePanel and to dialog shown after variable drag'n'drop

fix issue that if located variable was dropped in location column, then address was changed in wrong row (row - 1).

It's not neccessary to carry about label size. YToRow() does the work.

increase size for time buttons in LogViewer

The buttons are slightly bigger now. This gives more space for label
translations in other languages.
closes #12

don't rebuild the makefile based project if only companyName, projectName or productName are changed

And this fix current encoding issues, because all these information fields can
contain non-latin characters.

add progress bar to status bar

It can be used to display progress during program upload.
To use it call ShowPLCProgress (like ShowPLCProgress("transfered",
10)) in your PLCObject implementation.

fix warning: 'return' with no value in function startPLC

fix inconsistent whitespace

fix license notices in source files and license files under GPLv2+

Previously a lot of files were referenced to GNU Public License 2.1,
which never existed.
All copyright attributions are kept the same.

fix PLC autostart option for Beremiz_service.py

remove old debug code

fix wrong font family in CustromGrid control

closes #10

now only correct chart can be created in SFC Viewer

if user trying to connect incompatible blocks (by IEC 61131-3 standard), wire highlight will become red