Improve Okurigana feature

[Toshihiko-Yamazaki]

Hello,
I'm considering the improvement of Okurigana feature.
Please confirm whether the reviced code is acceptable or not.

[Improved feature]
Improve Okurigana feature

[Issue]
If the verb of "消費する" is included with the sentnce,
The unexpected issues will be detected as 不正な送り仮名.

[Measure]
The unexpected issues won't be deteced
if the existing code is replaced with the reviced code.

The existing code

static {
    invalidOkurigana = new HashSet<>();
    invalidOkurigana.add("費さ");
    invalidOkurigana.add("費し");
    invalidOkurigana.add("費す");
    invalidOkurigana.add("費せ");
    invalidOkurigana.add("費そ");

}

The reviced code

static {
    invalidOkuriganaTokens.add(new ExpressionRule().addElement(new TokenElement("費さ", asList("動詞", "自立"), 0)));
    invalidOkuriganaTokens.add(new ExpressionRule().addElement(new TokenElement("費し", asList("動詞", "自立"), 0)));
    invalidOkuriganaTokens.add(new ExpressionRule().addElement(new TokenElement("費す", asList("動詞", "自立"), 0)));
    invalidOkuriganaTokens.add(new ExpressionRule().addElement(new TokenElement("費せ", asList("動詞", "自立"), 0)));
    invalidOkuriganaTokens.add(new ExpressionRule().addElement(new TokenElement("費そ", asList("動詞", "自立"), 0)));
}

If the reviced code is conducted,
the behavior is the folowing.

The detected issues
費した
費す
Not the deteced issues
消費する
費やす

I think there are similar 26 patterns like the above.
26 patterns make them improve the reslt.

[coveralls]

Coverage increased (+0.09%) to 91.403% when pulling d8171f8 on Toshihiko-Yamazaki:master into 57bbef7 on redpen-cc:master.

[takahi-i]

Thank you very much for the valuable contributions!! @Toshihiko-Yamazaki

[Toshihiko-Yamazaki]

Thank you very much for confirming and merging my code. I have been working on my work to take advantage of RedPen. I’ll continue to consider how to use RedPen efficiently.