See #57 - Add Developer Mode to installer.

    Adds an extra_includes directory to installer and loads .php files from that directory
    reponds to a php define DEVELOPER_MODE, which if set to true will
    - by pass the renaming of admin directory
    - set a default temporary password of developer1
ISSUE-136  unvalidated redirect remove url redirect and add specific functionality for redirecting...
CHANGE-89 - Optimize the refactored login logic
CHANGE-291
CHANGE-709 - Refactor logging infrastructure
- Disable textfile-logging by default
CHANGE-709 - Refactor logging infrastructure
- Add severity-level filter option
- Add language defines, and log-data-interpretation instructions
CHANGE-709 - very basic fix to display problem
Merge pull request #58 from zcwilt/v160

See #57 - Add Developer Mode to installer.
Merge pull request #69 from zencart/v160

zc 160