title: Change source input from file to string in th translate.lua
body: <p>I am new to lua and I am wondering if I can send on the translate.lua -src a string and not a file where the string exists. I have searched a lot before posting but I could not manage to find something similar. My main problem is that Machine Translation is getting slower because I have to read/open from files. Thank you in advance!</p>
  
  <p>for example: <code>-src /TestFolder/TestFolder/TestFolder/TestFolder/TestFolder/TestFolder/TestFolder/test.txt;</code> instead of file add a string directly.</p>