Add docs badge to README
Implement bitpos command.

This command landed in unstable today.
Tests are taken and translated from the original Tcl test suite.
Handle only stop parameter set, but not start.

If start is not specified, the value given for stop will be injected
into start's position; it is wise to safeguard against this.
(via @yaauie)
Merge pull request #412 from badboy/bitpos

Implement bitpos command.
Merge pull request #411 from rrrene/patch-1

Add "inch" docs badge to README
Remove myself from .travis.yml
Only override `nil` options, not `false` ones
Add a fork safety test
Add an `enable_inherited_socket` option

When this option is enabled the pid check used to detect
fd leaking will be disabled. That way, you can reuse the same
connection across forks.

`enable_inherited_socket` is disabled by default.