Updates #363

fix #531

Detect calls that do not target a function's entrypoint
(i.e, calls to runtime.duffzero and runtime.duffcopy) and
instead step into them directly.  StepInto sets a breakpoint
past the called function's prologue and expects that continue
will hit that breakpoint, but because the call is into the
interior of the function (well past the prologue) this fails.

Fixes #573

Fixes flakiness of TestCmdLineArgs.

Fixes #589

Patch https://go-review.googlesource.com/23085 has been merged so we
can go back to using golang.org/x/debug/.

See: https://github.com/golang/go/issues/16180

This version preserves the order of requests, allows the
client to switch between API versions and introduces a
way to send notifications to the client (see TODO item at:
proc/proc_linux.go:325).

Fixes #523, #571

This provides a better error message when the user tries to run dlv
debug on a directory that does not contain a main package, when `dlv
exec` is used with a source file.

Additionally the architecture of the executable is checked as suggested
by @alexbrainman in #443.

Fixes #509

This function was broken for a very long time until the changes in this
PR fixed it. However I do not think it is desirable to be catapulted
into some other goroutine by 'next' just because that other goroutine
happened to receive a message on a channel.

This feature should be implemented by a new command, not next.

Previously Step would step through the goroutine associated with
CurrentThread if SelectedGoroutine was parked

Previously Next would step through the goroutine associated with
CurrentThread if SelectedGoroutine was parked

Also fixes a bug with proc.(*Process).StepInto where StepInto could
switch to a different goroutine.

* tests: update to cope with go1.7 SSA compiler

* de-vendored golang.org/x/debug/dwarf

We need our own tweaked version

* dwarf/debug/dwarf: always use the entry's name attribute

Using the name attribute leads to better type names as well as fixes
inconsistencies between 1.5, 1.6 and 1.7.

* proc: Updated loadInterface to work with go1.7

go1.7 changed the internal representation of types, removing the string
field from runtime._type.
Updated loadInterface to use the new str field.

Fixes #554

* Docs: Update Documentation/cli/README.md.

For better user experience, display subcommands in alphaetic order.

This issue is fixed by go 1.7, the test will only run on newer versions
of the compiler.

Fix typo.

Fix typo.

Fix a typo.

* documentation: copied old documentation from wiki

* command: better online documentation

Help without arguments prints just a short summary for each command,
help followed by a command prints the command's syntax and a longer
explanation.

* documentation: automatically generate Documentation/cli/README.md

* proc: bugfix: StepInto can not function when temp bps exist

* terminal,service: auto-continue during next and step

Make dlv call continue automatically when a breakpoint is hit on a
different goroutine during a next or step operation.
Added API hooks to implement the other solution to this problem (cancel
the next/step operation if a different breakpoint is hit).

Fixes #387

If we are unable to correctly guess how a type is serialized in
debug_info let the user specify it directly.

Workaround for #455

While tracing delve may spend most of its time outside of
proc.(*Process).Continue, which renders
service/rpc/client.(*Client).Halt ineffective.
This commit changes the implementation of
service/rpc/client.(*Client).Halt to make it capable of stopping traces.