Update .gitignore

* Remove autotools stuff.
 * Add cmake build dirs.
 * Remove binaries compiled in place.

.gitignore

@@ -3,27 +3,15 @@ Debug/
 Release/
 .vs/
 *~
-Makefile
-Makefile.in
-macros/
 .deps
 *.o
 *.a
 *.la
-autom4te.cache/
-aclocal.m4
-config.h*
-config.status
-config.log
-configure
-libtool
 po*/*.gmo
 po*/POTFILES
 po*/stamp-po
-admin/ltmain.sh
-celestia
-buildstardb
-stamp-h1
 .dirstamp
 build
-Celestia_QT
+build-cmake
+cmake-build
+.qmake.stash