Merging version 0.6.1 of libsodium
Adding scrypt to the bindings
scrypt_ll is now bound. Only _ll has been properly tested (using original test vectors)
Linking the pwhash/scrypt in the main sodium.js file
Added a test file for the scrypt wrapper object and scrypt constants. Fixing bugs and typos
Working on key file encryption, with scrypt password derivation
Key saving completed internal methods. To be tested. Must update the JS bindings and their arguments handling
Unmatched methods interfaces. Encrypted keys now to be tested
Constructor binding updated. Load&Save to be updated. Then finally we can properly test key encryption
Loading and saving encrypted key files works
Adding setKeyBuffer and getKeyBuffer. To be tested and documented, especially warned about their danger and in which case they can be used