Create a function fo reload the plugin. Fix setting of mediwiki syntax.

Also adds a few additional link creation tests.

test/link_creation.vader

@@ -5,6 +5,11 @@ Given vimwiki (Text that is not a wikilink):
   www.google.com
   https://www.google.com
   multiple words
+  let's
+  let's
+  file.wiki
+  file.md
+  file.mw
 
 Execute (Set syntax to default):
   call SetSyntax('default')
@@ -20,12 +25,28 @@ Do (Create links default syntax):
   j
   v$
   \<Enter>
+  j
+  v$
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
 
 Expect (Vimwiki links):
   [[test]]
   [[www.google.com]]
   [[https://www.google.com]]
   [[multiple words]]
+  [[let's]]
+  [[let]]'s
+  [[file.wiki]]
+  [[file.md]]
+  [[file.mw]]
 
 Execute (Set syntax to markdown):
   call SetSyntax('markdown')
@@ -41,15 +62,31 @@ Do (Create links markdown syntax):
   j
   v$
   \<Enter>
+  j
+  v$
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
 
 Expect (Markdown links):
   [test](test)
   [www.google.com](www.google.com)
   [https://www.google.com](https://www.google.com)
   [multiple words](multiple words)
+  [let's](let's)
+  [let](let)'s
+  [file wiki](file.wiki)
+  [file](file.md)
+  [file mw](file.mw)
 
 Execute (Set syntax to mediawiki):
-  call SetSyntax('mediawiki')
+  call SetSyntax('media')
 
 Do (Create links mediawiki syntax):
   \<Enter>
@@ -62,11 +99,27 @@ Do (Create links mediawiki syntax):
   j
   v$
   \<Enter>
+  j
+  v$
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
+  j
+  \<Enter>
 
 Expect (Mediawiki links):
   [[test]]
   [[www.google.com]]
   [[https://www.google.com]]
   [[multiple words]]
+  [[let's]]
+  [[let]]'s
+  [[file.wiki]]
+  [[file.md]]
+  [[file.mw]]
 
 Include: vader_teardown.vader