added minimalist test for signin
added test code for signin process
sign in page
fixed syntax error in sessions controller
added initial signin session
added remember_token to db user's model test spec
added remember token test
rename sessions table to relaxation_sessions
problem with sessions controller create
fixed syntax error, pass all tests with 59 examples
added link to homepage
editted some static pages
added functionality user signed in after registering
added sign out functionality and passed all test with 63 examples
some conflict