Merge pull request #297 from gabeos/devel

Cleaned VectorSpace make methods & updated deprecated norms.
compute correlation matrix - surprised this was missing.
Merge pull request #298 from stucchio/correlate

compute correlation matrix
covmat/correlation for sequence of vectors also
Merge pull request #299 from stucchio/correlate

covmat/correlation for sequence of vectors also
Merge branch 'devel' of github.com:gabeos/breeze into devel

* 'devel' of github.com:gabeos/breeze:
  Updated Encoder to use Field rather than Double, and fixed small inheritance issue in VectorSpace