Fixed issue #13, regression form PR #12, completely replacing functio…

…nality with just the npp template code

Adpated to size_t for documents greater 2GB

Merge pull request #12 from chcg/update_npp_8.3

update to nppplugintemplate version 4.2 for N++ 8.3

move bin to github https://github.com/DominicTobias/SecurePad/releases