cmd/geth: reinstate dropped --cache flag

These accessors were introduced by light client changes, but
the only method that is actually used is GetNumberU64. This
commit replaces all uses of .GetNumberU64 with .Number.Uint64.

archiveUpload did not handle absolute paths correctly. Fix it by using
the basename and ensure that uploads can be tested using -n.

This commit adds support for creating Windows installers to ci.go

internal/build: call correct signer method

build: fix missing .exe executable names on cross builds

console, vendor: update liner and enable multiline mode

appveyor: build 386 too, upload both to the gethstore

solves #3119
Signed-off-by: VoR0220 <rj@erisindustries.com>

* travis.yml: don't create darwin/386 builds

* build: remove godep remains

* internal/build: improve archives

- enable compression for zip files
- don't write half-complete archives

* build: add -unstable to archive names

travis, build: implement uploading archives to azure

common/math: go fmt

* common/math, core/vm: implement fast EXP.

Courtesy @chfast & @karalabe

* common/math: fix go vet issues on exp calculation

* core: Add metrics collection for transaction events; replace/discard for pending and future queues, as well as invalid transactions

* core: change namespace for txpool metrics

* core: define more metrics (not yet used)

* core: implement more tx metrics for when transactions are dropped

* core: minor formatting tweeks (will squash later)

* core: remove superfluous meter, fix missing pending nofunds

* core, metrics: switch txpool meters to counters