update package.exs for hex
make jsxbench more descriptive
add `Makefile` to work around an `erlang.mk` assumption
add `maps_support/0` function that reports whether `jsx` was
compiled with maps support or not
add `erlang.fake` Makefile to support `erlang.mk`
add a `return_maps` option that returns maps instead of proplists
document `return_maps` in README
add `uescape` option for 7 bit clean output of strings
document `uescape` option in README
v2.2
allow unicode noncharacters and reserved space characters in json
strings

fixes #67
switch string parsing to a count and slice implementation
perform `uescape` escaping in the decoder (for json -> whatever
transformation)`
allow control codes in json passed to the decoder

a malicious actor can introduce the same codepoints via \uXXXX
escapes and they are not dangerous in erlang binaries regardless
remove hipe config and unused benchmarking tool
v2.3.0

let's not hype it up too much