Add Haskell zipper exercise
Add "unsubmit" instructions
#859 set user.current if attempt is not complete
Update zipper exercise based on @etrepum's comments
Update code.rb

Updated to include objective-c file type '.m' so that submissions work.
Merge pull request #983 from mjansen401/set_current_in_seeds

#859 set user.current if attempt is not complete
Merge pull request #989 from redspike/patch-1

Update code.rb for Objective-c
Add missing instructions to contributing file
Merge pull request #964 from pminten/haskell-zipper

Add Haskell zipper exercise
Added WordCountTest.java and a sample example.java for word-count assignment
Merge pull request #984 from sagarsane/java-word-count

Added word-count test exercise in Java track and supporting example.java
Use camelCase in Java tests
Update objective-c.erb

Updated to include more verbose instructions for creating XCode Project
Update objective-c.erb
Merge pull request #990 from redspike/patch-2

Potential update to Objective-c setup instructions
"octal" strings containing invalid characters should evaluate to 0.

Have added tests to assert that"8", "9", "6789" & "abc1z" should each evaluate to 0. Also added tests that a leading 0 in the octal string is considered valid.

The octal class code has been changed to pass the additional tests.
Merge pull request #991 from dpneumo/Octal

"octal" strings containing invalid characters should evaluate to 0.
Improved work algorithm

Work will not return a submission that a user has alredy commented on
Merge pull request #992 from rjmcdonald83/master

Improve work algorithm. Fixes #988
Add bob exercise in scala