Fix for bug #876: Windows 7/8/10 - Pinning Jabref to the taskbar

[tobiasdiez]

Previously, JabRef couldn't be pinned to the taskbar (bug report). The reason is that, by wrapping JabRef with Launch4j, Windows thinks only Java is running and does not recognize JabRef as something separate.

Based on a stackoverflow question the fix proceeds in two stages:

• During the setup, we create a (dummy) shortcut and set the Application User Model Id. For this, we use the WinShell plugin for NSIS.
• At program start, we notify Windows that this JabRef instance has the AppUserModelId specified in the setup. In order to do this, we invoke native commands using the Java Native Access (JNA) library.

[koppor]

Thank you for the pull request. My issue is that it includes commits not being related with the fix. The typical way of creating pull requests is to have a separate branch for each pull request. So we can discuss each improvement separately.

The comment is very useful. However, it would be better to place it in the commit message to have it stored in the git repository, too. We have an initial code documentation at https://sourceforge.net/p/jabref/wiki/Development_Howtos/, but I think, that is the wrong place for that.

[tobiasdiez]

I see your point! The other git commits just revert some local changes so that I'm in sync with your repository. All changes in "Files changed" are needed for this fix.
Since I'm new to git, I would welcome if you could provide me tips how I can now remove the unnecessary commits and add the above description to the commit message. Thanks.