Cast into a local variable before dereferencing

https://github.com/rom1v/androidannotations/commit/879f196e4fcfd647ad0b674827ca22ef51459953#commitcomment-3261065
Remove useless comment

https://github.com/rom1v/androidannotations/commit/879f196e4fcfd647ad0b674827ca22ef51459953#commitcomment-3261070
Refactor targetTime -> targetTimeMillis

https://github.com/rom1v/androidannotations/commit/879f196e4fcfd647ad0b674827ca22ef51459953#commitcomment-3260958
Refactor delay -> remainingDelay

https://github.com/rom1v/androidannotations/commit/879f196e4fcfd647ad0b674827ca22ef51459953#commitcomment-3261105
Javadoc for @Background annotation

https://github.com/excilys/androidannotations/pull/564/files#r4329001