Add --without-x option to R target

Fixes #95.
Merge pull request #96 from jrrideout/issue-95

Add --without-x option to R target
remove python targets and unnecessary R targets

Fixes https://github.com/qiime/qiime-deploy/issues/55 and #97.
Hotfix for QIIME_CONFIG_FP env var

This variable is being set twice by qiime-deploy after https://github.com/qiime/qiime-deploy/pull/56 was merged. New strategy is to have qiime-deploy set the env var.
Merge pull request #100 from jrrideout/qiime-config-fp-fix

Hotfix for QIIME_CONFIG_FP env var
Merge branch 'master' into qiime-deploy-issue-55

Conflicts:
	qiime-dev/qiime.conf
Merge pull request #99 from jrrideout/qiime-deploy-issue-55

remove python targets and unnecessary R targets
updated to point to new git location
updated to point to new download location
updated old url to new release location
Merge pull request #102 from gregcaporaso/pynast-port

updated to reflect pynast's move to the biocore organization