String normalisation should account for Unicode homoglyphs

#### Steps to Reproduce
###### Input
    #httyd.14-12-12.log-1010-04:54 <@StaRn3ss> Toothless! eat tomako
    #httyd.14-12-12.log-1011-04:54  * Toothless doesn't feel like eating tomako!
    [...]
    #httyd.14-12-12.log-1023-04:55 < NightPixel> Toothless! eat tomakο

###### Expected Output
    #httyd.14-12-12.log-1011-04:54  * Toothless doesn't feel like eating tomakο!

###### Actual Output
    #httyd.14-12-12.log-1024-04:55  * Toothless gulps down tomakο!
    [...]
    #httyd.14-12-12.log-1038-04:56 < NightPixel> it's a Greek omicron character, not an o