Fix javadoc in ConfigRenderOptions.setFormatted

It looks like this was copied from setComments and one bit wasn't changed.
Merge pull request #197 from chris-martin/ConfigRenderOptions-setFormatted-javadoc

Fix javadoc in ConfigRenderOptions.setFormatted
typo: "will (now -> not) throw"
Merge pull request #198 from chris-martin/typo_now-not

typo: "will (now -> not) throw"
README: show how to do "inheritance" on one line
add badge + link to maven central
Merge pull request #200 from tyrcho/patch-1

add badge + link to maven central
README: link to maven central directory

Fixes #203, linking to super-old releases was just confusing.
Add profiling of getting values from a Config

To run these, do
> project config
> test:runMain GetExistingPath
> test:runMain HasPathOnMissing
> test:runMain CatchExceptionOnMissing
Use nanotime for profiling and use more iterations

This doesn't make the benchmarks all accurate or anything
but maybe makes them a little less likely to be way off.
Change CatchExceptionOnMissing bench to have more stack frames
Avoid PathBuilder for fast-path path parsing

This makes the typical path parse much faster:
 - avoid Character.isLetter in favor of just ASCII alphanumeric
 - allow fast path with hyphens and underscores involved
 - don't use PathBuilder, build a Path directly by
   traversing the string backward; this avoids some
   object allocation
README: recommend hasPath rather than catching Missing
Avoid awkward do-while in Tokenizer.pullQuotedString

Not a big deal, but I think this reads more clearly now.
Merge pull request #210 from chris-martin/pull-quoted-string-do-while

Avoid awkward do-while in Tokenizer.pullQuotedString
Missing backtick in HOCON.md

Reported by @takc923
Upgrade to SBT 0.13.7
Merge pull request #215 from benmccann/minor-upgrades

Upgrade to SBT 0.13.6
updated README.md to add link to python port (pyhocon)
Merge pull request #216 from chimpler/master

Updated README.md to add link to python port (pyhocon)