Adding AbstractBlocklyFragment and demo SimpleFragment

[AnmAtAnm]

Also clarifying comments about the save path overrides.

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This change is 

[AnmAtAnm]

Review status: 0 of 14 files reviewed at latest revision, 3 unresolved discussions.

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 1 at r1 (raw file):

Previously, RoboErikG wrote…

copyright

Done.

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 32 at r1 (raw file):

Previously, RoboErikG wrote…

Missing class doc

Done.

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 83 at r1 (raw file):

Previously, RoboErikG wrote…

add "using {@link #getWorkspaceSavePath()}" to match comment above.

Done. Here and in AbstractBlocklyActivity.

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Comments from Reviewable

[RoboErikG]

Review status: 0 of 14 files reviewed at latest revision, 6 unresolved discussions.

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 66 at r2 (raw file):

 * bundle.  If no workspace is loaded, it defers to {@link #onLoadInitialWorkspace}.
 * <p/>
 * Configure the workspace by providing definitions for {@link #getBlockDefinitionsJsonPaths()},

nit: replace comma with ' and'

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 250 at r2 (raw file):

    }

    public boolean onOptionsItemSelected(MenuItem item) {

missing method javadoc

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 256 at r2 (raw file):

        int id = item.getItemId();

        if (id == R.id.action_save) {

Should this be a switch instead of an if/else?

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Comments from Reviewable

[AnmAtAnm]

Review status: 0 of 14 files reviewed at latest revision, 6 unresolved discussions.

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 66 at r2 (raw file):

Previously, RoboErikG wrote…

nit: replace comma with ' and'

Fixed here and in AbstractBlocklyActivity

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 250 at r2 (raw file):

Previously, RoboErikG wrote…

missing method javadoc

Done.

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blocklylib-core/src/main/java/com/google/blockly/android/AbstractBlocklyFragment.java, line 256 at r2 (raw file):

Previously, RoboErikG wrote…

Should this be a switch instead of an if/else?

"Resource IDs cannot be used in switch statement in Android library modules."

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Comments from Reviewable