Changes wording of readme file for easier comprehension.
Changes wording of readme file for easier comprehension.

seema-at-box/box-android-sdk,HouKun1230/box-android-sdk,seema-at-box/box-android-sdk,seema-at-box/box-android-sdk,brianytang/box-android-sdk,MariusVolkhart/box-android-sdk,ittaishay/box-android-sdk,box/box-android-sdk,box/box-android-sdk,follower/box-android-sdk,allentcm/box-android-sdk,box/box-android-sdk