Fixed an issue with Maven Shade Plugin
Added shell script for getting commands to release automatically
Improved get_release_commands.sh will set new development version and print better commands
Added git related commands
Ignore also Intellij project files
Added final command to clean local repo of temporary files
Prepare release zt-zip-1.6
prepare for next development iteration
Improved new dev version setting for case where current version is .n9 where n in [1..9]
Cleaned up pom.xml.
Issue #20, add removeEntry and removeEntries methods.

Removing is done on the fly, without unpacking, deleting entries and
packing back. This adds some complexity and performance overhead with
handling directories correctly. 

Current implementation scans given entries names, determines which are
directories and then tests every entry against that list to determine if
current entry is inside of one of the dirs to remove.
Merge pull request #22 from zeroturnaround/remove-entries

Merge issue #20, add removeEntry and removeEntries methods.