Update README.md

Add instructions of documentation
Make CreateAuthorizationHeader public to use for OAuth Echo
Rename solution files

CoreTweet-All.sln ... build all binaries include PCL
CoreTweet-Mono.sln ... build only binaries can be built on Mono
Support rate limit of headers
Merge pull request #48 from azyobuzin/feature/ratelimit

Support rate limit of headers
Remove GetExpressionValue
Implement Rfc3986UrlEncode and add test modules
Revert "Remove GetExpressionValue"

This reverts commit 755c156ff3e17078232da6326f99dc0c1206ba08.
Fix test project files
Add RFC3986 test string
Fix Rfc3986EscapeDataString
Update README.md

Add about async methods
Remove untested platforms in README.md
Delete .gitattributes, fix wrong-typed methods
Implement mutes/users APIs, fix bug on enumerating cursor
Add IsMuting property to Friendship
Merge pull request #49 from azyobuzin/feature/mutes

Implement mutes/users APIs
Bump to 0.3.2
Fix typo of API urls
Replace tabs

sorry