make static field final
remove duplicated elements in pom.xml.
close #15: detect columnDefinition property.

It isn't critical problem, so I use NORMAL_PRIORITY.
Merge pull request #16 from eller86/column-definition

Detect columnDefinition property
Merge branch 'master' into detect-implicit-length

Conflicts:
	README.md
	src/main/meta/bugrank.txt
	src/main/meta/findbugs.xml
	src/main/meta/messages.xml