ignore all build directories and delete errant .gitignore.bak

.gitignore

@@ -4,7 +4,7 @@
 #ignore thumbnails created by windows
 Thumbs.db
 #ignore build folder
-[Bb]uild
+[Bb]uild*/
 #Ignore files build by Visual Studio
 *.obj
 *.exe

.gitignore.bak

@@ -1,34 +0,0 @@
-#ignore backup copies
-*~
-*.swp
-#ignore thumbnails created by windows
-Thumbs.db
-#Ignore files build by Visual Studio
-*.obj
-*.exe
-*.pdb
-*.user
-*.aps
-*.pch
-*.vspscc
-*_i.c
-*_p.c
-*.ncb
-*.suo
-*.tlb
-*.tlh
-*.bak
-*.cache
-*.ilk
-*.log
-[Bb]in
-[Dd]ebug*/
-*.lib
-*.sbr
-obj/
-[Rr]elease*/
-_ReSharper*/
-[Tt]est[Rr]esult*
-*.sdf
-*.opensdf
-ipch/