Merge pull request #164 from onelogin/merge_159_and_162

Fix WantAssertionSigned bug
Merge pull request #169 from ReaxDev/merge_159_and_162

WantAssertionSigned should be either true or false
Fix WantAssertionSigned. Merge branch 'merge_159_and_162'
Merge branch 'master' into ds-implementation

* master: