Removed TIME
Added hash method for CoordinateSym
Added separaye dcm cache to frame
Fixed typo
Drop unused skip_abs option for Expr.compute_leading_term and calculate_series

    This was introduced in 89c7626 and then this option was unused since 9c46974
Drop obsoleted docs about skip_log option of compute_leading_term()

    This was replaced by logx option in 9c46974d
Add logx option for lseries()
Drop _eval_lseries from exponential.py
Rewrite calculate_series with lseries
Explicitly specify Order variables in various series methods
Fixed test failure
Remove unneeded substitution of log(w)
Created GammaMatrixHead object, fixes and improvements on the tensor module.
Changing code to utilise Rational
Forgot this file
Merge pull request #2382 from meclark256/root_system

Root system
Power representation implemented
Doctests added
Merge pull request #2395 from Manoj-Kumar-S/seriessolve

SeriesSolve support for SymPy
Added zeros argument