Fixed unicode support in the source code

[sergeyklay]

Closes #56
Closes #62

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (development@2f5032a). Click here to learn what that means.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             development      #65   +/-   ##
==============================================
  Coverage               ?   35.06%           
==============================================
  Files                  ?        5           
  Lines                  ?     6246           
  Branches               ?        0           
==============================================
  Hits                   ?     2190           
  Misses                 ?     4056           
  Partials               ?        0

Impacted Files	Coverage Δ
parser/scanner.re	47.18% <ø> (ø)
parser/scanner.c	38.65% <ø> (ø)
parser/zephir.lemon	11.86% <ø> (ø)

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