Add a .gitattributes for the bash scripts

.gitattributes

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+###############################################################################
+# Set default behavior to automatically normalize line endings.
+###############################################################################
+*               text=auto
+
+###############################################################################
+# Set the merge driver for project and solution files
+#
+# Merging from the command prompt will add diff markers to the files if there
+# are conflicts (Merging from VS is not affected by the settings below, in VS
+# the diff markers are never inserted). Diff markers may cause the following 
+# file extensions to fail to load in VS. An alternative would be to treat
+# these files as binary and thus will always conflict and require user
+# intervention with every merge. To do so, just comment the entries below and
+# uncomment the group further below
+###############################################################################
+
+*.sln           text eol=crlf
+*.csproj        text eol=crlf
+*.vbproj        text eol=crlf
+*.vcxproj       text eol=crlf
+*.vcproj        text eol=crlf
+*.dbproj        text eol=crlf
+*.fsproj        text eol=crlf
+*.lsproj        text eol=crlf
+*.wixproj       text eol=crlf
+*.modelproj     text eol=crlf
+*.sqlproj       text eol=crlf
+*.wmaproj       text eol=crlf
+
+*.xproj         text eol=crlf
+*.props         text eol=crlf
+*.filters       text eol=crlf
+*.vcxitems      text eol=crlf
+
+*.sh            text eol=lf