Supported operators:

- All (binary and unary) operators between basic types except <-,
++ and -- (includes & to take the address of an expression)
- Comparison operators between supported compound types
- Typecast of integer constants into pointer types
- struct members
- indexing of arrays, slices and strings
- slicing of arrays, slices and strings
- pointer dereferencing
- true, false and nil constants

Implements #116, #117 and #251

The new contents of api.Variable are documented in
proc/variables.go.

Implements #243

Use runtime.allgs instead of runtime.allg that has been removed in
https://github.com/golang/go/commit/5a68eb9f25a2a6290800278df972e04a4085cee3

Instead of trying to be clever and make an 'educated guess' as to where
the flow of control may go next, simple do the more naive, yet correct,
approach of setting a breakpoint everywhere we can in the function and
seeing where we end up. On top of this we were already setting a
breakpoint at the return address and deferred functions, so that remains
the same.

This removes a lot of gnarly, hard to maintain code and takes all the
guesswork out of this command.

Fixes #281

Three locations are returned for goroutines: its current location,
its current location excluding unexported runtime functions and
the location of its go instruction.
The command 'goroutines' takes a new parameter to select which
location to print (defaulting to current location w/o runtime)

Fixes #253

Fixes #275

Fixes #273

Replaces a lot of ugly Makefile nonsense with a script that codesigns
the test binary before it runs. Only applicable to OSX test runs.

Only used under Linux, no need to have it available on Process itself.

Prevents a lot of goroutines hanging around, especially when running
tests.

This adds support for breakpoints statistics

Fixes #247

Additionally removes test code / html / txt / etc from vendor dir.

Embedded structs are encoded in DWARF as fields with
package-qualified names.  They define an anonymous field
on the struct with the non-qualified name, as well as
promoted fields for each field of the embedded struct so
long as these are not shadowed by fields of the containing
struct.

Fixes #220.

I encountered the error message described in the issue while debugging
InfluxDB. I can confirm that after this fix the error disapeared.

Fixes #258

<esc>[0m (reset) should be used instead of <esc>[37m (set foreground
color to white)

/proc/pid/stat needs more complex parsing

Fixes #239

If an optional linespec argument is passed to clearall command then only
breakpoints matching this linespec will be cleared.

Behavior of clearall command without arguments hasn't changed.

The 'source' command reads the file specified as argument and executes
it as a list of delve commands.
Additionally a flag '--init' can be passed to delve specifying a file
containing a list of commands to execute on startup.

Issue #96

Fixes #257