added modextramessageonload to easyconfigs
it works
option renamed to modextratclfooter
working modextraloadmsg
rename new easyconfig parameters and corresponding module_generator methods + minor clean up
add unit tests for msg_on_load and add_tcl_footer methods in module_generator
enhance toy build unit tests to test easyconfig parameters related to generated module file
Merge pull request #5 from boegel/module-append-text

rename loadmsg/tclfooter easyconfig params, clean up supporting functionality, add unit tests
Merge branch 'develop' into module-append-text

Conflicts:
	test/framework/toy_build.py
Merge pull request #8 from boegel/module-append-text

fix conflict with develop
Merge branch 'develop' into module-append-text

Conflicts:
	easybuild/tools/module_generator.py
Merge branch 'develop' into module-append-text

Conflicts:
	easybuild/framework/easyblock.py
	easybuild/framework/easyconfig/default.py
	easybuild/tools/module_generator.py
Merge pull request #974 from boegel/module-append-text

add support for modloadmsg and modtclfooter easyconfig parameter