readme installation: update version to 1.0.1

[artyhedgehog]

Updated version in Installation paragraph of README: current installation snippet is misleading.

[coveralls]

Pull Request Test Coverage Report for Build 113

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.0%

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Totals
Change from base Build 110:	0.0%
Covered Lines:	92
Relevant Lines:	100

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💛 - Coveralls

[MichaelMarner]

Thanks for picking this up!