Add syntax highlighting for new swift attributes.

Source:
developer.apple.com/library/ios/documentation/swift/conceptual/Swift_Programming_Language/Attributes.html
Fixes curly braces in strings affecting indentation

Closes #25
Remove oneline argument from swiftString

This should fix the issue where, if you start a string which a single
non-matched quote, the string and interpolated string isn't highlighted
until the quote was closed. This seems like a bad idea since strings
only function when they are on a single line and this example:

"foo
" bar

highlights like they can spread over multiple lines. Where `bar` is
highlighted like a keyword and not part of an unclosed string. This is
also how ruby.vim does this so I assume this is the way to do it.

This fixes #28
Move comment pattern, update division operator

This fixes an issue where the beginning /* in a C-style block comment
was interpreted as an operator. I read somewhere in syntax.txt (I think)
that the order rules appear in the syntax definition file affects the
interpretation. This is one of those times. The comment block needs to
be after the operator definitions.
Merge pull request #32 from Keithbsmiley/ks-comment-fix

Move comment pattern, update division operator
Add first syntastic checker
Working on indentation
Moving away from cindent
Handle square brackets
Case statements
Cleanup a bit
Remove logging
Remove brackets from indentkeys

This are handled already, this just moved them to the left a second time
when brackets were not auto inserted
Attempt indentkeys removal
Fix multi-line function declaration
Small cleanup
Fix * highlighting

Closes #33