optimized unicode hanlding

Benchmark
Mode Thr     Count  Sec         Mean   Mean error    Units
i.g.j.serializerTests.Test.complexTestGroovy
thrpt   1         3    1     1106.761     2427.777    ops/s
i.g.j.serializerTests.Test.complexTestGroovyJava
thrpt   1         3    1     3478.700      239.748    ops/s
i.g.j.serializerTests.Test.complexTestGroovyJavaWithoutRecursion
thrpt   1         3    1     3146.272     1017.996    ops/s
i.g.j.serializerTests.Test.complexTestGson
thrpt   1         3    1     7212.594      490.748    ops/s
i.g.j.serializerTests.Test.complexTestJackson
thrpt   1         3    1    17689.500     1913.581    ops/s
i.g.j.serializerTests.Test.complextTestBoon
thrpt   1         3    1    18883.883     1154.169    ops/s
i.g.j.serializerTests.Test.mediumTestBoon
thrpt   1         3    1   343066.411    77232.497    ops/s
i.g.j.serializerTests.Test.mediumTestGroovy
thrpt   1         3    1    13522.194      989.366    ops/s
i.g.j.serializerTests.Test.mediumTestGroovyJava
thrpt   1         3    1    90207.089     5534.207    ops/s
i.g.j.serializerTests.Test.mediumTestGroovyJavaWithoutRecursion
thrpt   1         3    1    67278.339     4207.174    ops/s
i.g.j.serializerTests.Test.mediumTestGson
thrpt   1         3    1   121326.317     4870.211    ops/s
i.g.j.serializerTests.Test.mediumTestJackson
thrpt   1         3    1   215300.028    17522.360    ops/s
i.g.j.serializerTests.Test.simpleTestBoon
thrpt   1         3    1  1775993.683   107090.545    ops/s
i.g.j.serializerTests.Test.simpleTestGroovy
thrpt   1         3    1    72049.922     5410.355    ops/s
i.g.j.serializerTests.Test.simpleTestGroovyJava
thrpt   1         3    1    89995.744     6354.954    ops/s
i.g.j.serializerTests.Test.simpleTestGroovyJavaWithoutRecursion
thrpt   1         3    1    67570.550    11325.997    ops/s
i.g.j.serializerTests.Test.simpleTestGson
thrpt   1         3    1   503976.683    26141.143    ops/s
i.g.j.serializerTests.Test.simpleTestJackson
thrpt   1         3    1   708675.256    71526.396    ops/s