Fix for embedded browser internal navigation by default

Both WeSay and FieldWorks have experienced unexpected web browser
launching instead of displaying content in embedded browsers.  See
https://jira.sil.org/browse/WS-158 for example.
Merge pull request #82 from sillsdev/Fix-Embedded-Browsers

Fix for embedded browser internal navigation by default
Update the URL for downloading the Bloom/WeSay version of the "Art of Reading."

The needed url changed slightly with the redesign of the Bloom website
Merge pull request #86 from JohnThomson/fixAoRDownload

Update the URL for downloading the Bloom/WeSay version of the "Art of Re...
Give initial instructions for using search box to find AoR images