Bare minimum configuration for travis-ci
Fixing references to the BasicModel. Added section to describe the BasicModel helper class.
Adding more info for the credential handlers configuration.
Adding more information for the different built-in credential handlers.
[PLINK-258] - Fixing salt issues. Supporting additional configuration options to the PasswordCredentialHander.
Updating documentation.
Adding volatile keyword to the lastRenewTime field. DefaultSecureRandomProvider now uses Random.nextLong as a seed when no key length is provided.
Merge branch 'PLINK-258'
Merge pull request #185 from pedroigor/master

[PLINK-258] - Fixes for salt generation and more configuration options to the PasswordCredentialHandler.
Fixing documentation build.
Merge remote-tracking branch 'upstream/master'
Fixing references to the old SecurityContext type.
[PLINK-260] - IdentityManager.retrieveCredentials and retrieveCurrentCredential is not working.
Merge pull request #186 from pedroigor/master

[PLINK-260] - IdentityManager.retrieveCredentials and retrieveCurrentCredential is not working.
[PLINK-258] - Using AtomicLong instead of volatile field.
[PLINK-225] - Thread safety improvements to the File store.
Merge remote-tracking branch 'upstream/master'
[maven-release-plugin] prepare release v2.5.1.Final
[maven-release-plugin] prepare for next development iteration
Merge branch 'release/2.5.1.Final'