implement natural evaluation support
move preferences into separate activity
use light holo theme
move memory and stack action buttons to action bar
bump version to 0.4
reorganize code base
naive and rpn-function style evaluators
paraphrase some preference hints
use default themes
list fragments selection fix
translate preferences to russian
bump version to 0.4.1
update translations
translate fragment titles
translate setting title
translate action buttons
bump version to 0.4.2
optimize some findViewById() calls
fix double push evaluation bug
bump version to 0.4.3