Merge pull request #2108 from Guite/1.4

removed obsolete Sf2 forms plugin
Added missing BC check

refs https://github.com/zikula/core/issues/1863
Added simple url conflict checks, refs #1878
correct legacy event type. refs #1792 refs #2078 refs https://github.com/Portugao/MUImage/issues/112
remove use of deprecated exceptions. refs #1980
change to more appropriate exceptions. refs #1980
Merge pull request #2114 from cmfcmf/conflict-checks

Added simple url conflict checks, refs #1878
remove unneeded import.
Merge pull request #2113 from craigh/exceptions

Use better exceptions where appropriate. refs #1980
update changelog
Raised memory limit
Raised memory limit
cs fixes