Fix typo in property name

Changed property name from controlsAreVisble to controlsAreVisible
Merge pull request #2 from jimmyti/patch-1

Fix typo in property name
Merge pull request #3 from jimmyti/master

double-adding a subview is changing the z-ordering, which can obstruct a callout.
add comment for fix for obstructed callouts
remove unused code that generates a warning

This function generates a warning when compiled with  -Wmissing-prototypes, which was causing build failures in our app (warnings as errors). Since the code appears to be unused, I removed it instead of forward-declaring a prototype.
Merge pull request #4 from chucks/fix-prototype-warning

remove unused code that generates a warning
allow dragging the controls window. This is nice if it obstructs something you're tweaking.
be more conservative about reco'ing the window drag gesture. It's disconcerting when you're going for a slider, miss, and get the window drag.
improve readme, add screenshot
shrink screenshot
Try to English slightly better.
screenshot still too big
Merge remote-tracking branch 'upstream/master'