New feature:	-e option for specifying files to install by extension.
New feature:	-e option for specifying files to install by extension.

Added a new command line option that takes a comma-separated list of
file extensions (e.g., .in,.cpp,.hpp) in order to limit the total files
installed.  The main reason I need this is for installing the Boost
headers as part of the VPR installation.


git-svn-id: 769d22dfa2d22aad706b9a451492fb87c0735f19@6069 08b38cba-cd3b-11de-854e-f91c5b6e4272

vancegroup-mirrors/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,vrjuggler/vrjuggler,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,LiuKeHua/vrjuggler,godbyk/vrjuggler-upstream-old,MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,vrjuggler/vrjuggler,vrjuggler/vrjuggler,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,godbyk/vrjuggler-upstream-old,godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,godbyk/vrjuggler-upstream-old,MichaelMcDonnell/vrjuggler,LiuKeHua/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,godbyk/vrjuggler-upstream-old,vrjuggler/vrjuggler,vrjuggler/vrjuggler,LiuKeHua/vrjuggler,vancegroup-mirrors/vrjuggler