Set build string to GIT_BUILD_STR in meta.yaml

[jrsmith3]

Add the following to meta.yaml:

build:
    string: {{ environ.get('GIT_BUILD_STR', '') }}

In this way the commit hash (more or less) will be set as the conda build string and therefore I will be able to identify from which commit a particular conda build was produced.

[jrsmith3]

I'm reopening this issue in order to reorganize the commits. Also I want to use the noarch directive in meta.yaml (see #38) and I can't figure out how to simultaneously get the functionality described in this issue to work with the funcitonality described in #38.

[jrsmith3]

This issue is old so I’m closing it. If I need something like it again, I will reopen it.