require php 5.5

tweak PHP version in composer.json
implement nonexistent method check

remove .gitkeep [skip ci]

WIP - stubbage [skip ci]

WIP - start building [skip ci]

WIP - reimplement Caching class without PHPUnit mocks [skip ci]
implement nonexistent class check
add docblocks
start implementing replacement proxy methods
implement private method check
fix incorrect test
working implementation with string args

WIP - implementation, doesn't work yet
reimplement with Doctrine\Cache
limit args to scalar values

clarify README

clarify in README
mention cache_method inspiration
clarify README
refactor caching logic into statically defined class
improve indenting on heredoc'ed eval code
extend support for more argument types

extend support for even more argument types
add docblocks
eliminate nested reset() call
refine README
update composer.lock
cleanup

remove unnecessary method call

replace vsprintf call with sprintf

remove unnecessary PHPMD warning suppression