Log4Cocoa Code

- NEW: addition of a new L4LoggerNameMatchFilter class and associated unit test

Sample application shoing log4cocoa's use.
Changed raising NSException to just log a base error instead.
Changed tests to not use unsigned values, but to typecast instead.
Added a precompiled version of OCMock.
Added xcconfig files for many differnt ways to build.

Added in some missing retain calls.
Minor code cleanup.
Thanks to Ken Grigsby for pointing these out.

Updated the tests to handle the unsigned int type (oops!).
Minor formatting changes (whitespace - yes, I know...).

Changed some int data types to NSUInteger.

L4Level.m : Added a missing retain.
L4PatternLayout : Added %t as a pattern for the current thread. Also added a unit test to assert that the tokens in the pattern are correctly identified.

Corrected the install path. There doesn't seem to be a macro for /Library/Frameworks, so it's set to that without the use of a macro.

Corrected for missing retain calls.

Create the beta3 tag.

Changed the install location.