Share projects' schemes
Restore Xcode 4 compatibility
Add Travis configuration file
Update podspec
Updated README.markdown to include more documentation pages

Assuming some people never visit the wiki section directly, it should be good to have at least the basic doc pages ref'ed directly
Useless array removed
- indentation fix
Merge pull request #163 from dstd/master

Useless array removed
Method declarations that make it easier to extend/modify DispatchQueueLogFormatter

Better than copy-pasting code.
Merge pull request #164 from rivera-ernesto/dispatchqueuelogformatter_overridablemethods

Method declarations that make it easier to extend/modify DispatchQueueLogFormatter
Add new DEBUG log level support to included loggers

Complements #145.
Ignore deprecated warning for dispatch_get_current_queue

This function is never executed on devices where it's deprecated anyway.

Closes #165.
Merge pull request #166 from rivera-ernesto/debug_level_for_loggers

Add DEBUG log level support to included loggers
Merge pull request #167 from rivera-ernesto/ignore_deprecation

Ignore deprecated warning for dispatch_get_current_queue
Merge pull request #169 from rivera-ernesto/travis_support

Travis support
"Fix" conflicts with 3rd party libraries using CocoaLumberjack

As discussed in #162, there's no solution to sharing `ddLogLevel` between libraries and the client application:

* Apps/libraries may define `ddLogLevel` as a const, extern, int, a function returning an int, etc. Each one incompatible with the other.

* Even more, if apps/libraries used a compatible and shared `ddLogLevel` there would be no way to manage separately log levels from each one.

The solution is to define a `LOG_LEVEL_DEF` by default equal to `ddLogLevel` so apps can continue to work as usual.

3rd party libraries simple redefine `LOG_LEVEL_DEF` to something different:

```obj-c
// #undef LOG_LEVEL_DEF // Undefine first only if needed
#define LOG_LEVEL_DEF myLibLogLevel
```

3rd party frameworks **need** to be updated.