Tensor packages

I have completed the first round of renamings in share/tensor to make the
package compatible with commercial MACSYMA. These are now in CVS. For the
record, and until the documentation is updated, here's what changed:

ctensor			Was: ctensr
imetric(name)		Was: metric(name)
icounter			Was: counter
idummy()			Was: dummy()
ichr1,ichr2			Was: chr1, chr2
indexed_tensor()		Was: indexed()
icurvature()		Was: curvature()
igeodesic_coords()	Was: geodesic()
lorentz_gauge()		Was: lorentz()
ishow				Was: show()
ic_convert()		Was: generate()
ct_coords			Was: omega
ratriemann			Was: ratrieman
ctayswitch			Was: tayswitch
csetup()			Was: csetup()
uriemann()			Was: raiseriemann()
riem[]			Was: r[]
uriem[]			Was: ur[]
ricci()			Was: lriccicom()
ric[]				Was: lr[]
uricci()			Was: riccicom()
uric[]			Was: ricci[]
ein[]				Was: g[]
ctaylor()			Was: dlgtaylor()
ctayvar			Was: param
ctaypt			Was: taypt
ctaypov			Was: minp
ctransform()		Was: ttransform()
levi_civita()		Was: lc()
extdiff			Was: @
liediff			Was: @L

The demos I tested seem to work properly.


Viktor