MainViewController: Add |-_setupNotificationObservers|
MainViewController: Rename private methods with prefix _
PokemonDetailTabViewController: Subclass from KYArcTabViewController
SixPokemonsDetailTabViewController: Subclass from KYArcTabViewController
Delete CustomTabViewController, CustomTabBar
SixPokemonsDetailTabViewController: Set child VCs to local instances
Make use of the new LLVM compiler's feature on NSArray
Add Config-Sample.h/m as sample for Config.h/m

Untrack Pokemon/Config.*
Modify OAuthManager.m to use the MACROs defined in Config.h
Untrack Config.h, Modify Config-Sample.h

Add examples for OAuth Configuration section in Config-Sample.h
Add additional tips for Config-Sample.h on top
Use "extern NSString * const" instead of "#define"

Use "externNSString * const" to hide values in .m file;
OAuthManager: Set OAuth configuration params as iVars, so it can be
encrypt in compile time.