add methods to ZipUtil for packing single files and changing their names
add method to ZipUtil for packing multiple files explicitly specifying their names as a string array of the same arity
delete ListNameMapper and the corresponding method in ZipUtil
add Innokenty Shuvalov to the list of ZipUtil authors
add static method to FileSource to map an array of files to array of their names
fix test files initialization and move all tests to 'org.zeroturnaround.zip' package
add test for ZipUtilTest integration with FileSource.pair method
add Innokenty Shuvalov as FileSourceTest author
Merge pull request #53 from innokenty-shuvalov/master

Add utility methods to ZipUtil for packing multiple files with custom entry names.