Bump version to 0.3.7.
Use Runnable instead of AsyncTask to poll for syncthing web gui (fixes #41).

This works around a  problem with pre-Jellybean devices, where AsyncTask
must be created on the main thread,
Bumped version to 0.3.8.
Revert "Use Runnable instead of AsyncTask to poll for syncthing web gui (fixes #41)."

This reverts commit a215e3009810cb3ca6376f6eaf01e9e29210dd5c.
Cleaner solution for Gingerbread problems: use AsyncTask instead of Runnable

ref #18
Add syncthing preferences to app settings.
Added "restart" notification.
Cancel restart notification on shutdown, minor refactoring.
Moved SettingsActivity and WebGuiActivity to gui folder.
Preferences code cleanup.
Added native main activity with tabs for repos and nodes.
Fix crash on start after improper shutdown (fixes #16).
Change app theme for consistency with web ui.
Disable HTTPS setting in native GUI (ref #19).
Added local node info fragment in navigation drawer.
Change "Waiting for GUI" to "Waiting for API" in repo/node lists.
Fix app icon to open info drawer, code cleanup.
Added more info to repo/node list items.
Added node and repo settings activities.
Removed unused graphics.