updated version strings
updated changelog
updated version
reverted previous change...
Removed text referring to script that currently isn't merged into qiime
Merge pull request #1291 from gregcaporaso/180-dev

1.8.0-dev updates
Merge pull request #1294 from walterst/fix_rst_text_for_script_not_present

Removed text referring to script that currently isn't merged into qiime