Update README.md to account for misnamed method

In v0.5.4 onwards the method is no longer `execute` but looks to be `read`
update spec version
Merge pull request #17 from samirahmed/master

Update README.md to account for misnamed method
merge dev
Merge branch 'dev'

Conflicts:
	Office365.podspec
	sdk-objectivec/office365-e2end-tests/Podfile.lock
	sdk-objectivec/office365-e2end-tests/office365-e2end-tests/BaseController.m
Updated Pod files
updated pod files
Update README.md
Updated pod files
merge pull request
Merge branch 'master' into dev

Conflicts:
	sdk-objectivec/office365-e2end-tests/Podfile.lock