Remove download only scripts from version.txt

The presence of these scripts breaks the existing release because it doesn't
know how to handle them. See #180 and #199.
Merge pull request #202 from ethanwhite/remove-downloadonly

Remove download only scripts from version.txt
Fix flag in Inno Setup script

The proper way to have a checked option box is apparently to not set
a flag at all.

Oddly, the previous version must have worked for the last release,
but it doesn't work now.
Don't crash when a script fails to load.
Merge pull request #204 from bendmorris/badscripts

Don't crash when a script fails to load.
Merge pull request #203 from ethanwhite/fix-winstaller-script

Fix flag in Inno Setup script
Fix typo in message to user
Merge pull request #207 from ethanwhite/typo

Fix typo in message to user
Bumping version numbers and setting MASTER to False for release
Updating version.txt for release
Add retriever to system path not user path

In some cases adding to the user path will not allow the retriever to work
from the command line.
Remove Download Only scripts from version.txt in master

This is to prevent breaking the previous release since it was released
with MASTER = True and therefore tries to install the scripts in the
master version.txt

See #208 for more details and #180 and #199 for examples of this breaking.