support MD5.clone() and SHA.clone()
use correct type for empty data array
convert ints from signed to unsigned before converting to chars
Merge branch 'master' into hasher-clone
remove unused MIDP.getRandomInt function
move compareTypedArrays to util.js
test SHA.clone()
test MD5.clone()
fix syntax error in util declaration
add SHA.nativeClone method to clone SHA-1 hasher correctly
add MD5.nativeClone method to clone MD5 hasher correctly
refactor to better encapsulate functionality; rename vars to clarify types
Merge pull request #167 from mykmelez/hasher-clone

support MD5.clone() and SHA.clone()