Add translation_description to prepare for translation.

Clean up menu items.
- change "Record track" to "Record Track"
- change "Stop recording" to "Stop Recording"
- remove "Delete all tracks", "Please select the track to view",
  "Current track", and "Last segment".
- move "Elevation" to the stat label section.

.hgignore

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