Handle Character encoding of input and output test data

[anujgandharv]

A lot of EasyTest users have requested support for special characters.
Currently EasyTest supports only the default JRE Encodings to convert Unicode characters/code points.
In order to have more control over the encoding, EasyTest will be providing a mechanism to its user to specify the encoding to use while reading the strings from the Test Data files.

This will help users in testing various conditions around internationalization/encoding.

Some good reads on Character encoding :
http://www.joelonsoftware.com/articles/Unicode.html
http://scratchpad.wikia.com/wiki/Character_Encoding_Recommendation_for_Languages
http://stackoverflow.com/questions/1749064/how-to-find-default-charset-encoding-in-java