Merge branch 'dev'

remove Pharo3.0 from standard lineup until tests are clean [ci skip]
proposed fix for Issue #185 including test cases

moved GoferResolvedReference>>compare:using: to GoferVersionReference>>compare:using:, since we are not involving repositories...
minimal lineup to see how rest of tests fare
replace all GoferBar-lr.0 refs with GoferBar-lr.1 in tests
patch another test ...
enable all Squeak platforms to see if they all hang like 4.5
Squeak portability
enable full lineup
Merge branch 'issue_185'
Use ensureCreateDirectory.
Add FileReference extension
Merge pull request #187 from demarey/master

Pharo 3.0 support
run builds for pharo3.0 only
manually cherry-pick the Issue #188 fixes and tests from 1.0-beta.31 branch
Issue #188: bump monticello versions
restore full linuep
remove Squeak4.5 until Issue #189 resolved
Merge branch 'issue_188_1'
Issue #191: initial implementation and start testcase
Issue #191: finish test case