Add in memory adapter with login ticket model.
Extract in memory storage to separate class.
Add Ticket Granting Ticket model for in memory adapter.
Add RubyCAS Util class.

Provided by @tpickett66
Add Service and Proxy Ticket for in memory adapter.
Add Proxy Granting Ticket for in memory adapter.
Require Util.
Merge pull request #6 from rubycas/in_memory_adapter

In memory adapter
Add .rvmrc

Make sure that we will work on the latest ruby version.
Add debugger

Load debugger by default also in specs.
Add guard with guard-rspec

Generate Guardfile with basic configuration for guard.
Rename core spec to make it work with guard.
Add .DS_Store to gitignore
Change models namespace to Tickets
Replace core_ext for string by Util.

Move String.random to Util.random_string.
It is very risky to have ruby core extensions if we assume that
RubyCAS can be a part of bigger piece of software.
use active_support for symbolizing keys on hashes
Remove core_ext.
Add basic CAS Ticket functionality.

Generating and validating tickets functionality.
Set logger level base on settings.
Merge pull request #8 from rubycas/add-cas

Add basic CAS Ticket functionality.