Simplify .gitignore by using globs and added some more ignores

.gitignore

@@ -1,5 +1,10 @@
-Makefile
-Makefile.in
+*.gcno
+*.gcda
+*.o
+*~
+*#
+*.in
+cov/
 aclocal.m4
 autom4te.cache/
 config.log
@@ -10,68 +15,10 @@ config/config.h*
 config/stamp-h1
 configure
 docs/Doxyfile
-docs/Makefile
-docs/Makefile.in
 docs/html/
 examples/.deps/
-examples/Makefile
-examples/Makefile.in
-examples/test1
-examples/test1.o
-examples/test10
-examples/test10.o
-examples/test11
-examples/test11.o
-examples/test12
-examples/test12.o
-examples/test13
-examples/test13.o
-examples/test14
-examples/test14.o
-examples/test15
-examples/test15.o
-examples/test16
-examples/test16.o
-examples/test17
-examples/test17-a.o
-examples/test17.o
-examples/test18
-examples/test18.o
-examples/test19
-examples/test19.o
-examples/test2
-examples/test2.o
-examples/test20
-examples/test20.o
-examples/test21
-examples/test21.o
-examples/test22
-examples/test22.o
-examples/test23
-examples/test23.o
-examples/test3
-examples/test3.o
-examples/test4
-examples/test4.o
-examples/test5
-examples/test5.o
-examples/test6
-examples/test6.o
-examples/test7
-examples/test7.o
-examples/test8
-examples/test8.o
-examples/test9
-examples/test9.o
-include/Makefile
-include/Makefile.in
-include/tclap/Makefile
-include/tclap/Makefile.in
-msc/Makefile
-msc/Makefile.in
-msc/examples/Makefile
-msc/examples/Makefile.in
+examples/test[0-9][0-9]
+examples/test[0-9]
+Makefile
 tclap.pc
-tests/Makefile
-tests/Makefile.in
 tests/tmp.out