fblikebutton 6.x-2.1

I'm sorry the 2.0 release was faulty. This one includes all promised below and an extra fix.

Issue #1507646 by fivefrank: Fixed menu order
Issue #1507442 by MrDamasajaga: Old files are replaced by the new once. My excuse for a bad release. Still learning.

From the original 6.x-2.0 release:

Since jerdiggity is very bussy, MrDamasajaga joined as co-maintainer. This release has my additions: new functionality with a different approach (see: #1167194).

It is a direct port of my work on the D7 version.

• Introduced the option to display the FB like button in his own block earlier (instead of the content area).
• Added the option to display the button in the link area (as requested here: #1171922).
• Names: because the twofold nature of the module, changed the names of the two functions to: Dynamic Like button and Static Like button. They were called: General and Block. This because of the new possibility to display the "general" FB Like button also as a block. The big difference is the static/dynamic nature of the button.
• In order to make the twofold nature clear to the user the config pages are modified, added descriptions and some reorganization of fieldsets.
• Removed the settings on the block page, this is duplicate functionality, which can confuse the user. Added a link to the config page instead.