Updated code completion implementation to use CodeCompletionServices class
Updated code completion tests to use CodeCompletionServices
Merge branch 'master' of https://github.com/DynamoDS/Dynamo into fixCompletionTests_Part2
minor fixes
resolved merge conflicts
resolved merge conflicts
Merge branch 'fixCompletionTests_Part3' of https://github.com/aparajit-pratap/Dynamo into fixCompletionTests_Part2
code cleanup
addressed review comments
Fix regression
Minor update
Merge pull request #2884 from aparajit-pratap/fixCompletionTests_Part2

Updated code block UI and unit tests to use CodeCompletionServices
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Merge pull request #2905 from ke-yu/fix_testcase

Fix regressed excel testcase
Merge branch 'master' into Revit2015
Merge pull request #2906 from ke-yu/Revit2015

Cross master into Revit2015