add method for code more readable
add {get,put,remove}Attachment in indexedDB Storage
add test for indexedDB storage
fix blob storage exception in chrome browser
fix big data storage problem
remove digest test
add transaction check after request
add _start&_end option arguments for getAttachment
add new test for _start&_end
add _start&__end support for davstorage
add _start&_end test for davstorage
add rangestorage for _start&_end wrapper
add test for rangestorage
add rangestorage test command in tests.html
display _start & _end in message
remove unuse test
add storage type check in rangestorage
remove range storage
remove range test in tests.html
add param check for getAttachment