NTA-75 Update to check tx != null in txPrepareFailed
Merge pull request #69 from zhfeng/NTA-75

NTA-75 Handler throws NullPointerException when parsing the partial log files
NTA-63 Update DEFAULT_ITEMS_PER_PAGE
NTA-61 Add explanatory text to the log upload box
NTA-64 Update the pom.xml to add the missing information and maven-source-plugin
Merge pull request #70 from zhfeng/NTA-61_NTA-63_NTA-64

update