Added intel & foss toolchains
bump version to 1.13.0 and update release notes
fix remarks in v1.13.0 release notes
add missing entries in v1.13.0 release notes
Merge pull request #939 from boegel/v1.13.0

bump version to 1.13.0 and update release notes
Merge pull request #940 from hpcugent/develop

release EasyBuild v1.13.0
bump version to 1.14.0dev
bump version to 1.13.1dev
don't tweak easyconfigs if they were generated
make ModulesTool a singleton, use 'module use/unuse' rather than fiddling with $MODULEPATH, use $LMOD_QUIET rather than $LMOD_EXPERT
fix deprecation message in systemtools.py
fix unit tests now that ModulesTool is a singleton and use/unuse should be used
purge out any loaded modules before each test

Conflicts:
	test/framework/modules.py
clean up purging on modified $MODULEPATH in modulestool.py unit test module

Conflicts:
	test/framework/modulestool.py
purge *after* setting $MODULEPATH
also enable $LMOD_EXPERT, still requires with Lmod version prior to 5.6
add commandline override for optarch toolchain setting
added unit test.
fix unit test.
override optarch after arch check