added VariableTypeNotDeclaredInspection
Merge branch 'master'
fixed #116
Merge branch 'master' of https://github.com/retailcoder/RetailCoderVBE.git
fixes #117
all tests pass
added AssertTests, addresses #120
Added test for null vs empty string equality
added code inspection tests
fixes #107
fixes #122
Merge branch 'master' of https://github.com/retailcoder/Rubberduck into settingsUI