Feature Freeze for 1.8

Communication among Activities are slightly restructured.
Manual now supports "Tap Examples for Execution".
Release Candidate 1
Versions 1.8
Release Date Aug. 8
Fix of hang when Enter key pressed while EditText is empty.
1.8 RC2
If manual-doc is manually installed in /data/local/tmp/maxima-doc, then
it will be used instead of those in android_asset.
Temporary workaround for manual issue.
copyExample.js is now added to git.