[SHARED-15] updated readme
[SHARED-15] modified timestamp method
[SHARED-15] added invalid timestamp spec
[SHARED-15] modified gemfile
[SHARED-15] modified secretkey gem so that it initializes and produces timestamp on its on

[SHARED-14] modified timestamp variable to be more consistent
[SHARED-14] added travis yaml
[SHARED-14] modified version control
[SHARED-14] changed timestamp parameter to epoch based timestamp
[SHARED-14] updated Readme
[SHARED-14] added generate token method
[SHARED-14] got basic functionality passing
[SHARED-14] updated files