Doc correction and version bump now that PDF plotting is done internally to slhaplot pyslha-1.0.1

Added tag pyslha-1.0.0 for changeset f82d84b0002b

A big moment -- I see no reason not to call this version 1.0.0 now that all the plotting works as I intended! pyslha-1.0.0

Set decay line width based on BR by default, contollable with new --decaystyle option

Allow plotting from a string cated from stdin

Doc tweak

Make merged labels maintain the plot size by introducing x scaling

Rm addressed TODOs

Document label treatment options

Added pdflatex, kpsewhich and tikz.sty checks

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