add colorama to requirements.txt

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Colorize logs, using colorama.init() if under Windows.

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Fix install_*’s colorizing of code (was also reversed before)

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
remove unused import

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
move ColorfulStderrHandler to nikola.utils

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
fix typo: Colorizing → Colorized

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
fix nikola.py and __main__.py

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
flake8

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Merge pull request #1049 from getnikola/colorize-logs

Colorize log messages, even under Windows