Fix a few typos
Merge pull request #243 from kaneshin/master

Fix a few typos
Skip Install for iOS static library.

Otherwise, if you add BlocksKit as a dependency
target to another project, Xcode
“Product->Archive” creates a
“Generic Xcode Archive” instead of an .ipa file.
Merge pull request #244 from openresearch/master

Skip Install for iOS static library.
Fix wrong block signature.
Merge pull request #249 from mono0926/master

Fix wrong block signature
Merge branch 'master' of https://github.com/zwaldowski/BlocksKit