title: Issue with encoding of cyrlic character strings
body: <p>I have some cyrlic strings in my dataframe that I can't manage to read acuratelly. </p>
  
  <p>This is how the dataframe looks after I load the csv:</p>
  
  <pre><code>unique(transactions$orders)
   [1] "ÌÈÏÑ-ÏÏ30Å" "ÈÍÒ-ÏÏ30Å"  "ÊÈÁÑ-ÏÏ30Å" "ÊÈÁÑ-ÏÏ50Å" "ÌÈÏÑ-ÏÏ50Å" "ÊÈÁÑ-ÏÏ53Å" "ÈÍÒ-ÏÏ53Å" 
   [8] "ÌÈÏÑ-ÏÏ53Å" "ÈÍÒ-ÏÏ30"   "ÊÈÁÑ-ÏÏ30"  "ÌÈÏÑ-ÏÏ30"  "ÌÈÏÑ-ÏÏ50"  "ÈÍÒ-ÏÏ10"   "ÊÈÁÑ-ÏÏ50" 
  [15] "ÈÍÒ-ÏÏ40"   "ÊÈÁÑ-ÏÏ53"  "ÈÍÒ-ÏÏ53"   "ÌÈÏÑ-ÏÏ53"  "ÊÈÁÑ-ÏÏ10"  "ÈÍÒ-ÏÏ30Ï"  "ÊÈÁÑ-ÏÏ50Ï"
  [22] "ÌÈÏÑ-ÏÏ30Ï" "ÊÈÁÑ-ÏÏ30Ï" "ÌÈÏÑ-ÏÏ50Ï" "ÈÍÒ-ÏÏ50"   "ÌÈÏÑ-ÏÏ10"  "ÊÈÁÑ-ÏÏ53Ï" "ÈÍÒ-ÏÏ53Ï" 
  </code></pre>
  
  <p>Any ideas how I can fix this?</p>