drop agithub import, import vsc.utils.rest instead
Merge branch 'develop' into agithub_py24
drop duplicate (unprotected) import
fix remark
replace incorrect unit test for allow_system_deps with a proper one in toy.py unit test module
Merge pull request #938 from boegel/fix_start_env

fix starting environment for builds
Merge branch 'develop' into agithub_py24
store GitHub token in singleton, fetch it when required/useful
check for required deps for accessing GitHub API in options.py, make fetch_github_token obtain token via GithubToken singleton
fix remarks
Merge branch 'fix_gunzip' into test_1_13
Merge branch 'agithub_py24' into test_1_13

Conflicts:
	easybuild/tools/github.py