Log Message:
Update to 0.38

* New dependencies to boost and glm

Changelog:
0.38:
 * New high quality sprites.
 * Fullscreen toggle with alt + enter.
 * Window is now resizable. -WIDTHxHEIGHT! creates a non-resizable window.
 * Lowered minimum zoom distance.
 * Use AM_CPPFLAGS in Makefile.am to allow passing custom CPPFLAGS.
 * Don't add files that match the path of a known directory.
 * Fixed divide by zero in text shader causing artifacts on some video cards.
 * Recursively search for repository directory when log-format not specified
   (thanks to Jorg Bachmann for original concept / prototype).
 * New dependency on Boost Filesystem.
 * Doubled the maximum zoom out distance.
 * Allow negative timestamps before 1970 in custom log (artzub).
 * Fix for UTF8-CPP checked.h compilation issue (vszakats).
 * Fixed bug causing missing characters in text.
 * Fixed --highlight-users option not using highlight-colour.
 * highlight-colour default changed to white.
 * Added --selection-colour option (applied to selected users and files).
 * Added --dir-colour option (applied to directories).