Added first files for admin and login/signup in admin

paramecio2/libraries/db/extrafields/emailfield.py

@@ -0,0 +1,27 @@
+from paramecio2.libraries.db.corefields import CharField
+import re
+
+mail_pattern=re.compile("\w[\w\.-]*@\w[\w\.-]+\.\w+")
+
+class EmailField(CharField):
+    
+    def __init__(self, name, size=1024, required=False):
+        
+        super().__init__(name, size, required)
+        
+        self.error_default='Error: No valid format'        
+    
+    def check(self, value):
+        
+        value=super().check(value)
+        
+        self.error=False
+        self.txt_error=''
+        
+        if not mail_pattern.match(value):
+            
+            self.error=True
+            value=""
+            self.txt_error=self.error_default
+            
+        return value