Added the new upload directories and ignore the cache directory completely.

With SugarCRM 6.4 the `cache/upload` directory moved to `upload` and
`upload_backup`. These directories can safely be ignored.

Additionally the `cache` directory is now ignored completely because it
leads to the behaviour to use the git repository as a kind of backup
tool if several parts of it are included. Furthermore the directory
structure beneath `cache` is victim of enduring changes by the
developers.

I did also some code cleanup regarding the path names e.g. adding a `/`
before most file and directory names.

SugarCRM.gitignore

@@ -1,33 +1,21 @@
 ## SugarCRM
 # Ignore custom .htaccess stuff.
 /.htaccess
-# Ignore large parts of the annoying cache directory without breaking things.
-cache/csv/*
-cache/dashlets/*
-cache/diagnostic/*
-cache/dynamic_fields/*
-cache/feeds/*
-cache/import/*
-cache/include/*
-cache/jsLanguage/*
-cache/modules/*
-!cache/modules/emails
-!cache/modules/Emails
-cache/pdf/*
-cache/smarty/cache/*
-cache/smarty/templates_c/*
-cache/themes/*
-cache/xml/*
+# Ignore the cache directory completely. ATTENTION! This will break things!
+/cache/*
 # Ignore some files and directories from the custom directory.
-custom/history/*
-custom/modulebuilder/*
-custom/working/*
-custom/modules/*/Ext/
-custom/application/Ext/*
+/custom/history/*
+/custom/modulebuilder/*
+/custom/working/*
+/custom/modules/*/Ext/
+/custom/application/Ext/*
 # Custom configuration should also be ignored.
 /config.php
 /config_override.php
 # The silent upgrade scripts aren't needed.
-silentUpgrade*.php
+/silentUpgrade*.php
 # Logs files can safely be ignored.
 *.log
+# Ignore the new upload directories.
+/upload/*
+/upload_backup/*