Added explicit mention of pip3 for python 3

[ghost]

[carlbordum]

Hi Pravandan,

Thank you very much for your interest in improving the project! This change does not make sense to me. pip is still called pip in Python 3, although you may have it installed as pip3 on your system for convenience.

Please correct me, if I'm missing something

Carl

[ghost]

Hi Carl

See actually linux based systems come with Python 2 already installed and you have pip for that, but say if we want to install Python 3 along with Python 2 in the system, then there is the need for that pip3, so as to explicitly mention for which version of Python a particular library is being installed.

Thanks Pravandan

[Akuli]

could also recommend python3 -m if not using a virtualenv, also --user

[carlbordum]

Akuli, --user is already in README. Is that what you mean?

Clearing up the confusing stuff I left behind is encouraged!

[Summertime]

Manly should work the same on both python 2 and python 3. on a dual-python system, there isn't a practical difference between installing it as a python3 module, or a python 2 module

(And for those that care enough that they don't want it installed as a python 2 module, should know that they might need to make changes to the installation command)

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aside, should also include py -2 -m pip install --user manly and py -3 -m pip install --user manly, the windows versions of such a command