Update docs to have correct diffTop default (-10)

Change readme diffTop default to match the JS code.
-5 >> -10
bindSelect timeout var never set

The timer var was not being assigned, making the clearTimeout call pointless.
checkSelection shouldn't be passed an event argument

Some, but not all, calls to `checkSelection` were passing an event argument. The `checkSelection` method does not explicitly take arguments and does not use any via `arguments`.

I changed those calls to no longer pass an argument.
Merge pull request #108 from andrewhubbs/patch-1

Update docs to have correct diffTop default (-10)
Merge pull request #109 from andrewhubbs/patch-2

bindSelect timeout var never being assigned
Merge with andrewhubbs patch 3
Generates new dist files
Fixes #111
Ability to set custom labels on buttons
disableReturn flag also disables return when holding shift, or alt
Merge pull request #115 from adammulligan/master

disableReturn flag also disables return when holding shift, or alt
Updates dist files
Added strikethrough support
Subscript closing tag typo.
Dist files.
Dist files.
Merge pull request #116 from sebcioz/strikethrough

Added strikethrough support
Merge with master
1.4.0
Updates contributors