Enforces Array input for deterministicGenerateK
Updates README.md

Adds a larger warning to the stability of the master branch; and updates the library description to be more accurate.
Fixes typo and adds more direct answer
Adds BI.toPaddedBuffer and toBuffer
Removes applyMultisigs and adds setScriptSig
Removes type coercion for a stricter TX API
Removes convert module
Adds tests for TX.prototype.p2shsign