Convert -(NSString *)message, -(NSString *)name, -(GTObject *)target, and -(NSString *)targetType to properties.
Compile libgit2 with libssh2 for iOS
Update GTTag properties to use modern objective-c syntax.
Add options argument to GTRepository cloneFromURL
Add GTTagSpec and delete GTTagTest.
(The previous commit accidentally made those changes, this just updates the Project Settings)
Make new properties readonly.

(Style fixes as well)
Documentation.
Convert targetType from NSString to GTObjectType.
Make -(NSString *)description use dot-syntax.
Reverse polarities.
Documentation++.
Whitespace—.
More whitespace--.
Hopefully fixes spacing issues.
Whitespace— Again.
Merge pull request #253 from PiersonBro/Give-GTTag-Some-Love

Give GTTag Some Love
Merge branch 'libgit2' into libssh2
Remove dollar sign from brew install instructions
Make libssh2 shell script more readable
Move dependencies into External directory