Merge pull request #4 from google/vonhollen-dev

Fix default storage and policy paths in the PAM module and the docs.
Use copies of strings for creating GQuarks that are used for error handling. If this library is unloaded, static strings won't be available afterwards so they can cause a segfault.
Merge pull request #9 from google/vonhollen-quickfix

Fix segfaults in GLib applications when the PAM module is unloaded or reloaded.
Added AC_PROG_AR to configure.ac so autogen is happy on trusty
bumped version number
Merge pull request #10 from google/gerow-ac-prog-ar

Fixed autoreconf and bumped version number.
Merge changes in the 0.2 release into vonhollen-dev.
Bump version to 0.3 for the new release featuring pam_escalate.so.