Fixing issue with Signature file generation

If the certificate for the current user is not installed in LocalMachine
store location, check it in CurrentUser store location.
Merge branch 'master' of https://github.com/DynamoDS/Dynamo
Revert "Fixing issue with Signature file generation"

This reverts commit f597fc53c1b93da39dea6aebf4c9051152e52b1f.
Remove ToString out of Library search. FIxed MAGN5043 and MAGN3842
Updated code completion implementation to use CodeCompletionServices class
Updated code completion tests to use CodeCompletionServices
Change test cases according to changes
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
Merge branch 'master' of https://github.com/DynamoDS/Dynamo
Fixed Test Case 3166 by updating xml.

Some how there was one extra port was getting added to List.Join node which was causing test failure. Not sure how come this was passing earlier.
Bump the version number on Master to 0.7.4

Daily builds are going to run ahead of release build because it has more
than what's there in release branch. Hence RC branch will have version
0.7.3 whereas daily builds will have version 0.7.4
Merge pull request #2900 from riteshchandawar/FixFor3166

Fixed Test Case 3166 by updating xml.
Merge pull request #2901 from Benglin/Revit2015

Cross merging master changes into Revit 2015
addressed review comments
Merge pull request #2902 from Conceptual-Design/master

version number changed to 0.7.4