Bundling static assets into binary and using system temp dir

[justinfx]

First off, let me say thanks for this tool. I have found it very useful to be able to port our internal presentation template style and be able to continue using the go present tool approach.

A problem I have found when allowing other users to run the present-plus binary (to run my presentation), is that it is dependent on finding the source in $GOPATH, to then find the static and templates directories. Even if you try to copy those directories locally to the demo and use the -base flag, there is a check that happens earlier that still requires the ability to find the source.

In my own fork I have at least moved that check for the source pkg to only happen when no -base is provided.

Also, I have tried to take a look at embedding static assets into the binary, but it would take a little bit of refactoring since different files are dependent on reading the file system and global variables. So I am submitting this ticket in case someone else can look at it sooner. I would love to see the following:

• Embed static and templates assets into binary using something like go-bindata
• Stop using a tmp dir in the project source location, which can race anyways between different invocations of the present-plus tool. Instead, make use of a unique user temp dir which can be mapped to a http handler and also cleaned up when the program quits