*: fix comment typos and add go report card icon

*: check go version before building

cmd/dex: add logging config and launch logger for server module.

Add a script to check the Go version before building dex. This
gives a nice error message rather than just failing to compile.

With changes:

    $ go version
    go version go1.6.4 linux/amd64
    $ make
    ERROR: dex requires Go version 1.7+. Please update your Go installation: https://golang.org/dl/
    Makefile:93: recipe for target 'check-go-version' failed
    make: *** [check-go-version] Error 2

Checks only added for building the actual binary, not tests, since
this is aimed at users just starting off with the project.

Documentation: add notes on patch release branches

connector/ldap: default email_verified to true

*: add section about dex and Kubernetes to README

Documentation: add examples of mapping LDAP schema to a search

storage/kubernetes: remove unused method

Document managing dependencies

*: add Travis build status to README

*: update travis to use Go 1.7.4.

Themes plus css refactor

*: update vendored go-oidc

revert "Merge pull request #714 from amrutac/refactor-css"

This reverts commit 4d88eabb, reversing
changes made to b38d3552.

Includes fixes for a panic when using HTTP/2[0] and some HTTPs calls
not actually using their passed context[1].

[0] https://github.com/coreos/go-oidc/pull/117
[1] https://github.com/coreos/go-oidc/pull/119