Update Send to Google Docs code to use an activity

to show progress bar and an AysncTask to send
to Google Docs.

Future plan:
Plan to place common code across SendDocs, SendFusionTables,
and SendMaps in abstract classes.

.hgignore

@@ -0,0 +1,11 @@
+syntax:glob
+
+*/bin
+*/gen/**
+*/proguard/**
+.metadata
+MyTracksTest/AnnotationProcessor.log
+**/*.pyc
+**/*.pyo
+syntax: glob
+MyTracksTest/hs_err_pid*.log