added pod info to Install section

Install section says nothing about it being a Pod.  Pod is much preferable to copying the directory.
Handle deprecation warnings a little more gracefully.
Merge pull request #41 from geraldcor/master

Handle deprecation warnings a little more gracefully.
Merge pull request #39 from GantMan/patch-1

added pod info to Install section
Merge branch 'master' of https://github.com/simonbs/BSKeyboardControls

# By Gant Laborde (1) and Greg Corey (1)
# Via Simon Støvring (2) and Greg Corey (1)
* 'master' of https://github.com/simonbs/BSKeyboardControls:
  Handle deprecation warnings a little more gracefully.
  added pod info to Install section

Conflicts:
	BSKeyboardControls/BSKeyboardControls.m