resolve action name using the signature (#30)

[lugu]

An object can have several methods or signature with the same name. This
is the case of the ALMotion.moveTo API. In such case we need to search
an action based on the name and the signature.

Unfortunatly QiLoop have concept of compatible signatures. Here is an
example of missmatch:

(dlv) p sig
"(Is)<serviceRemoved,serviceID,name>"
(dlv) p m.Signals
map[uint32]github.com/lugu/qiloop/type/object.MetaSignal [
    86: {
	    Uid: 86,
	    Name: "traceObject",
	    Signature: "((IiIm(ll)<timeval,tv_sec,tv_usec>llII)<EventTrace,id,kind,slotI...+75 more",},
    106: {
	    Uid: 106,
	    Name: "serviceAdded",
	    Signature: "(Is)",},
    107: {
	    Uid: 107,
	    Name: "serviceRemoved",
	    Signature: "(Is)",},
]

Until a proper signature comparison method is found, we rely on the
hack:

For methods, find the first with:
- name, param and return type
- name, param type
- name

For signals and properties:
- try to match both name and signature
- if not a tuple, convert to tuple and try again
- match only the name

This is clearly not satisfactory and a proper signature comparison
algorithm is needed. It can be cased on a flatten conversion to tuple.
Like:

• (ii)<a,b,c> => (ii)
• (ii) => (ii)
• i => (i)

[codecov-io]

Codecov Report

Merging #31 into master will decrease coverage by 0.73%.
The diff coverage is 47.73%.

@@            Coverage Diff             @@
##           master      #31      +/-   ##
==========================================
- Coverage   68.35%   67.61%   -0.74%     
==========================================
  Files          51       51              
  Lines        8876     9013     +137     
==========================================
+ Hits         6067     6094      +27     
- Misses       2169     2244      +75     
- Partials      640      675      +35

Impacted Files	Coverage Δ
bus/proxy.go	72.34% <0%> (-14.76%)	⬇️
bus/object.go	62.8% <100%> (ø)	⬆️
meta/idl/proxy.go	92.12% <100%> (+0.07%)	⬆️
examples/space/space_stub_gen.go	51.86% <28.57%> (-0.39%)	⬇️
bus/logger/logger_stub_gen.go	48.78% <39.28%> (-0.74%)	⬇️
bus/object_stub_gen.go	28.21% <44.44%> (+0.03%)	⬆️
bus/directory/directory_stub_gen.go	63.56% <47.36%> (-1.76%)	⬇️
type/object/metaobject_decorator.go	55.22% <50%> (-8.86%)	⬇️
examples/clock/clock_stub_gen.go	59.49% <50%> (-1.04%)	⬇️
examples/pong/ping_stub_gen.go	61.43% <54.54%> (-1.15%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e8385b3...325f5c7. Read the comment docs.