fix: Allow bare `{! file.md !}' inclusion

Also moves the site tests into a bash script.

  Resolves #6.

mkdocs_semiliterate/plugin.py

@@ -59,7 +59,8 @@ with the first line of a file; in this case, `pause` and `terminate` retain
 their usual meanings, although there is not currently any way to resume from a
 `pause` when `start` is not specified. This adjustment to `semiliterate`
 parameters makes it easier to extract "front-matter" style documentation from
-files.
+files. It also means that a plain `{! file.md !}` directive will simply
+incorporate the full contents of `file.md`.
         """
         self.start_hot = False
         if 'start' not in kwargs:
@@ -75,8 +76,8 @@ files.
 
     include_open = re.compile(r'''(?<![`\\])(\{\!\s*)([\s'"])''')
     include_quoted_file = re.compile(
-        r'''(['"])(?P<fn>.*?)\1\s+(?P<yml>[\s\S]*?)\s\!\}''')
-    include_bare_file = re.compile(r'\s(?P<fn>.*?)\s+(?P<yml>[\s\S]*?)\s\!\}')
+        r'''(['"])(?P<fn>.*?)\1\s+(?P<yml>[\s\S]*?)\s?\!\}''')
+    include_bare_file = re.compile(r'\s(?P<fn>.*?)\s+(?P<yml>[\s\S]*?)\s?\!\}')
 
     def extract_line(self, line):
         """Copy line to the output stream, applying all specified replacements
@@ -101,10 +102,14 @@ files.
                 if body_match:
                     break
         if not body_match:
-            raise EOFError("semiliterate: End of file while scanning for `!}`")
+            errmsg = "semiliterate: End of file while scanning for `!}`"
+            utils.log.error(errmsg)
+            raise EOFError(errmsg)
         include_path = self.include_root + '/' + body_match['fn']
         new_root = re.match(r'(.*)/', include_path)[1]
         include_parameters = yaml.safe_load(body_match['yml'])
+        if not include_parameters:
+            include_parameters = {}
         with open(include_path) as include_file:
             self.transcribe(preamble)
             inclusion = StreamInclusion(