split default section into supported and default
transform use of [DEFAULT] to [SUPPORTED], use default section in gzip.eb test easyconfig
implement preliminary parsing of dependency specifications
Merge branch 'develop' into formatv2_supported_deps
complete implementation of handling dependencies in format v2, works for simple (name,version) deps
add unit test easyconfig to verify parsing of dependency specs
fix remark w.r.t as_dict ToolchainVersionOperator method, test functionality in unit tests
fix minor remark
correct use of self.default and self.supported in parse method
Merge pull request #826 from boegel/formatv2_supported_deps

[formatv2] split off supported section from default section, add preliminary support for a dependencies section