Add Search Functionality and update .exe and .dll file

[eduserna]

Add search functionality of the elements that are showed in the diagram.

In the MainForm:

• Add a textbox in the toolStripMain for enter a text to search
• Add a Search icon button in the toolStripMain for launching the search

When user click on the 'Search' button or press 'Enter' in the search text, the app search an element that contains the text. If there are no occurrences, it shows in the Status Label, 'Can't find the text' If there are any occurences, it shows in the Status Label, the number of occurrences, and selected the first element. If the user makes the same search again, the next element is selected, and so on...

The system stores in a private list the hitsElements, if the diagram changes, it clears the search.

Update .exe and .dll files

[dgis]

Thanks, it works great. Sorry, I saw the github email with your pull request only now :-( My bad.