Add completions

Added some common used typography entities

Author: Cosmin Cioacla

data/completions.cson

@@ -1,41 +1,61 @@
 completions:
   'acute accent': '´'
+  'almost equal': '≈'
   'ampersand': '&'
   'apostrophe': '''
   'broken vertical bar': '¦'
+  'bullet': '•'
   'cedilla': '¸'
   'cent sign': '¢'
+  'closing double quote': '”'
+  'closing single quote & apostrophe': '’'
   'copyright symbol': '©'
   'currency sign': '¤'
+  'dagger': '†'
   'degree symbol': '°'
   'diaresis': '¨'
   'division sign': '÷'
+  'double dagger': '‡'
+  'double prime': '″'
+  'down arrow': '↓'
+  'ellipsis': '…'
   'em dash': '—'
   'en dash': '–'
+  'euro sign': '€'
   'feminine ordinal indicator': 'ª'
   'greater-than sign': '>'
   'inverted exclamation mark': '¡'
   'inverted question mark': '¿'
   'left-pointing double angle quotation mark': '«'
+  'left-right arrow': '↔'
+  'left arrow': '←'
   'less-than sign': '<'
   'macron': '¯'
   'masculine ordinal indicator': 'º'
   'micro sign': 'µ'
   'middle dot': '·'
+  'minus sign': '−'
   'multiplication sign': '&mult;'
   'non-breaking space': ' '
+  'not equal': '≠'
   'not sign': '¬'
+  'opening double quote': '“'
+  'opening single quote': '‘'
   'paragraph sign': '¶'
   'plus-minus sign': '±'
+  'prime': '′'
   'pound sign': '£'
   'quotation mark': '"'
   'registered trademark sign': '®'
   'right-pointing double angle quotation mark': '»'
+  'right arrow': '→'
   'section sign': '§'
   'soft hyphen': '­'
   'superscript one': '¹'
   'superscript three': '³'
   'superscript two': '²'
+  'trademark': '™'
+  'up arrow': '↑'
   'vulgar fraction one half': '½'
   'vulgar fraction one quarter': '¼'
   'vulgar fraction three quarters': '¾'