Added mpes parser.

.gitmodules

@@ -105,3 +105,6 @@
 [submodule "dependencies/parsers/skeleton"]
 	path = dependencies/parsers/skeleton
 	url = https://gitlab.mpcdf.mpg.de/nomad-lab/parser-skeleton.git
+[submodule "dependencies/parsers/mpes"]
+	path = dependencies/parsers/mpes
+	url = https://gitlab.mpcdf.mpg.de/rpx/parser-mpes.git

mpes @ aa26d45a

+Subproject commit aa26d45aafc2e19dda14da1523913eb480092218

nomad/parsing/__init__.py

@@ -365,6 +365,12 @@ parsers = [
         parser_class_name='skeletonparser.SkeletonParserInterface',
         mainfile_mime_re=r'(application/json)|(text/.*)',
         mainfile_contents_re=(r'skeleton experimental metadata format')
+    ),
+    LegacyParser(
+        name='parsers/mpes', code_name='mpes', domain='EMS',
+        parser_class_name='mpesparser.MPESParserInterface',
+        mainfile_mime_re=r'(application/json)|(text/.*)',
+        mainfile_name_re=(r'.*')
     )
 ]