mmcgrana/gobyexample

Remove todo-ish list from examples.txt …

At this point we're probably not going to add major new examples to
Go by Example. Remove the todo-ish looking list from examples.txt to
avoid implying otherwise in that file.

some more ideas

meh

publish writing-files

publish reading-files

publish time-formatting-parsing

publish json

punt on this until we actually need it

trim out some marginal ideas for now

publish errors

publish string-formatting

publish random-numbers

update on time plans

publish epoch

publish time

start regular-expressions

publish string-functions

publish collection-functions

sketch interfaces

publish number-parsing

publish urls

drop ok-guards for now

publish methods

publish base64-encoding

publish structs

not helpful right now

publish pointers

publish panic and defer

add note about testing examples

publish command-line-arguments and command-line-flags

publish mutexes and stateful-goroutines

publish atomic counters

publish rate-limiting

publish worker-pools

publish closing-channels and range-over-channels