make cloudformation module accept template_parameters from command line

Passing cloudformation template_parameters on the command line
like so was failing:

    ansible localhost -m cloudformation -a "...template_parameters=foo=5,bar=4..."
make comment lines in troff start with .\" and add a .SH EXAMPLES to the PLAINEXAMPLES section
Obsolete attempts at determining the full path to the desired
'easy_install' executable were still left behind and need to be removed
for the customizable 'executable' task argument to correctly work:
'_get_easy_install' should take care of all the functionality related to
determining the correct 'easy_install' executable to use.
Merge pull request #4786 from SalesSeek/find-correct-easy-install

Fix determination of correct, possibly customized, 'easy_install' executable
Merge pull request #4760 from urbanmapping/devel

make cloudformation module accept template_parameters from command line
Merge pull request #4765 from mvo5/bugfix/fix-man-template

Fixes in the man template