code refactoring

Merge pull request #17 from Bandyer/remove_unwanted_log

remove unwanted log

add evaluate function

2.0.0

add evaluate function

fix a flaw in the activity tracking and the empty intent

1.5.13

fix a flaw in the activity tracking and the empty intent

fix animation bug

1.5.12

Merge remote-tracking branch 'origin/master'

fix backstack counting bug

1.5.11

fix backstack counting bug

fix minor bug in the recovery sequence

1.5.10

fix recovery looping issue

fix recovery looping issue

1.5.9

Merge remote-tracking branch 'origin/master'

remove animation

1.5.6

remove animation while recovery

fix minor bug in the recovery sequence

1.5.5

fix back stack issue

Fix backstack bug

1.5.4

fix back stack issue