Update README.md

I updated d-apt repository link.
Replace vibe install command by dub install because
Jordi's APT repository does't provide ``vibe`` package.
Updated DMD version.

Any way ``./setup-linux.sh`` doesn't work on Debian Wheezy:
Error:
```
Building configuration "application", build type debug
Running dmd (compile)...
Error: Executable file not found: 

Run 'dub help' for usage information.
```
Ignore directories in the HTTP file server. Fixes #256.
Fix compilation on non-Windows systems.
Fix compilation on non-Windows systems no. 2.
Cleaned all legacy stuff in resutil module.

Also moved some generic utilities from rest to restutil.
Deprecate 'index' special behavior.

Add pragma wich recommends transition to UDA's for "/" path definition.
Clean REST example for using 'index'.
Removed 'index' usage from docs.
Enable BSON and JSON serialization/deserialization of enum strings
Merge pull request #254 from yazd/bson-enum-fixes

Enable BSON and JSON serialization/deserialization of enum strings
Merge pull request #258 from Dicebot/deprecate_index

Deprecate index() special meaning in the REST interface generator.
Merge pull request #259 from Dicebot/rest_cleanup

Cleaned all legacy stuff in resutil module.
Remove the WinAPI+WinRT support code (too limited to be useful) and implement a timer based on DispatcherTimer.
Give a hint where a JSON format error was detected.
Avoid bogus error message.
Fix inversion in writeBson for bools.
Merge pull request #260 from biozic/master

Fix inversion in writeBson for bools.
Make allocators shared - due to D's GC this will cause bad memory bugs otherwise.

Specifically, the "nice" property of the GC to call finalizers in different threads than the constructor - even for thread-local objects - would cause an object to be deallocated by a different allocator than the one that allocated it.
Add an allowed_chars parameter to urlEncode().
Implement deregisterLogger().
Merge pull request #262 from zealotous/patch-1

Update README.md