as_vector() -> _as_vector(). sets writable = false
Merge remote-tracking branch 'upstream/master' into veccopy
change all as_vector() methods to be views
HotFix: fixes noisy_align
Merge remote-tracking branch 'upstream/master' into veccopy
DX, DP added to Affine Family

Note that this will break unit tests that use Affine in the fit
package - this is to be expected.
Implements DX, DL for PWA
moves the fit package over to using d_dp
DL and DX for TPS and RBF. Improved TPS d_dl.
moves PCA to use d_dp, PDM->ModelInstance
Merge remote-tracking branch 'upstream/master' into dxdpaffine
Merge remote-tracking branch 'upstream/master' into dldxtps
Merge remote-tracking branch 'upstream/master' into DXDLpwa
Merge remote-tracking branch 'upstream/master' into dpfit
Merge remote-tracking branch 'upstream/master' into dppca
change PWA d_dx to return a dead axis like affine
somewhat closer to where we want. untested
GlobalPDM bug fixes
Changed feature computation
adds aam benchmark methods