Fix issue #647: when converting from AI1 to AI2 project, create <screen>.yail files if missing

Change-Id: I3c08b2bcc4f582a31e882cb3e0f877e07ba58c30
Removed unnecessary call to ask about project type- we only have one project type

Change-Id: I19ec8c41ced0b46beb7e8785b456531dd86553b2
Add Automatic backup of blocks files every 24 hours

Change-Id: Iab6ecdd95ce9f10c0a31b3fbaebf74eeec67f81a
Don’t wait forever for the Companion to start

In the Emulator (or USB) don’t wait forever for the Companion to
start. Try a certain number of times and then give up.

Change-Id: I441866ebedbc9517f0f95897863197a41914d8d8
Add scrollbars=yes where we open documentation

Change-Id: Ib46ff6ec359b9cb528855efa576cbd277ef640f0
Adds checkbox property to Camera to open the front-facing camera.

Adding option to request front-facing camera.
Added default value to new property.
Updated documentation to match.

Change-Id: I18780f1bedd27266b02d40f90a3079f42e6792ec
Add a “Hard Reset” Connection Menu Item

This menu selection tells the aiStarter to run the “reset-emulator”
script. This script removes the user specific
Appinventor-emulator-data file, which will effectively reset the setup
package installation to a “factory” fresh state.

Change-Id: Icfbf0a35f2aa5d1102db27c290533e5490e38fef
Fix language version ungrader for change to camera component

Change-Id: I81f7873d0c44c85871cc09e73b9d0272af35b0be
Fix crash reulsuting from trying to create a canvas bitmap with width or
height equal to zero.   This is apparently an order of events issue related to
width or height being specified as FILL_PARENT.  This is trac issue 631

Change-Id: I29c88ee0a9701c92505800ff0f117f45d17e308f
Update Title of Connection Failure Message

Change-Id: Ic9461793d29b96732a79e1dbe8b52223ac15e2d2
Fetch information in bulk about projects.

Reduce the number of datastore api calls at startup when the meta data
about all projects is gathered. Three calls are reduced to one for
each project.

Change-Id: Ia257515e5c4e7d62c662c49f24ba68055c4e55fd
Provide a specific error message when rpc is incompatible

Change-Id: Id9f5ae4ef8f1d2fe0b69f3051cfa418f778abf7e
Increase the reliability of starting the Emulator

Increase the “ubergiveup” threshold to 8. Add the option for the user
to tell App Inventor to keep trying even after the ubergiveup
interval. Add an extra intent to start the Companion if it hasn’t
shown a response yet. This should increase the chances of the
Companion starting on very slow computers. Changed some timers
as well.

Minor change to the build environment so that versions are marked
“dirty” (in the Help->About Menu) if the system was built from a work
tree that has changes that are not yet committed in any branch.

Change-Id: I7bd42d36b3b005c2e072aad60b65afe555e8f2e1