Add 'EmptyStringTest.java' which shows problem with empty strings
Read empty string followed by new line.
Fix #3 https://github.com/mwanji/toml4j/issues/3
Added Toml#to(Class, Gson) to allow for test output as specified by
BurntSushi/toml-test
Improved comment handling and disallowed mixed arrays
Changed "key group" to "table" in error message
Added datetime-malformed-no-leads test
Added failing test on invalid number
Mention wip branch in README
Merge branch 'master' into wip