Updated version number to v0.22.0-SNAPSHOT
Improved errors thrown by function `parse`
Fixed #177: function `add` not adding strings and matrices element wise
Removed testing unstable node.js 0.9 from Travis
Fixed an implicit require path to an index file
Updated list with function not supporting bignumbers
Added a few advanced examples
Fixed typo
Excluded `crypto` library from bundle
Deprecated functions `Parser.parse` and `Parser.compile`. Use `math.parse` and `math.compile` instead.
Updated docs
Fixed #172: parser not being able to evaluate an exponent followed by a unary minus like `2^-3`, and a transpose followed by an index like `[3]'[1]`.
Released version 0.21.1