Added a feature that allows to verify translated string items via similarity of each reversed results.

In this version strsync allows to verify approximate string matching percentage while working in translation.

If user adds an option -v or --verify-results,
String similarity of the reversed translation result for each languages will be displayed.

$ strsync (...) -v

el
  Hi: Hi -> Γεια σου -> Hi, Matched: 100%
fr-CA
  Hi: Hi -> Salut -> Hello, Matched: 50%
id
  Hi: Hi -> Hai -> Two, Matched: 0%
fr
  Hi: Hi -> Salut -> Hello, Matched: 50%
uk
  Hi: Hi -> Привіт -> Hi, Matched: 100%
hr
  Hi: Hi -> Bok -> Book, Matched: 0%
da
  Hi: Hi -> Hej -> Hi, Matched: 100%
ja
  Hi: Hi -> こんにちは -> Hello, Matched: 50%
he
  Hi: Hi -> היי -> Hey, Matched: 50%
ko
  Hi: Hi -> 안녕 -> Hi, Matched: 100%
sv
  Hi: Hi -> Hej -> Hi, Matched: 100%
es-MX
  Hi: Hi -> Hola -> Hello, Matched: 50%
sk
  Hi: Hi -> ahoj -> Hi, Matched: 100%
zh-CN
  Hi: Hi -> 你好 -> How are you doing, Matched: 50%

if user adds --ignore-unverified-results [Integer, Percentage (0~100) (default=0)],
If the similarity of each reversed translation result is under the given value, that string will be skipped(ignored).

strings will be skipped if its text similarity from reversed translation result is under 50 

$ strsync (...) --ignore-unverified-results 50 

el
  Hi: Hi -> Γεια σου -> Hi, Matched: 100%
fr-CA
  (Ignored) Hi: Hi -> Salut -> Hello, Matched: 50%
id
  (Ignored) Hi: Hi -> Hai -> Two, Matched: 0%
fr
  (Ignored) Hi: Hi -> Salut -> Hello, Matched: 50%
uk
  Hi: Hi -> Привіт -> Hi, Matched: 100%
hr
  (Ignored) Hi: Hi -> Bok -> Book, Matched: 0%
da
  Hi: Hi -> Hej -> Hi, Matched: 100%
ja
  (Ignored) Hi: Hi -> こんにちは -> Hello, Matched: 50%
he
  (Ignored) Hi: Hi -> היי -> Hey, Matched: 50%
ko
  Hi: Hi -> 안녕 -> Hi, Matched: 100%
sv
  Hi: Hi -> Hej -> Hi, Matched: 100%
es-MX
  (Ignored) Hi: Hi -> Hola -> Hello, Matched: 50%
sk
  Hi: Hi -> ahoj -> Hi, Matched: 100%
zh-CN
  (Ignored) Hi: Hi -> 你好 -> How are you doing, Matched: 50%