fix typo

ECMASCript --> ECMAScript
fix typo: forsee --> foresee
Merge pull request #225 from cncolder/patch-1

fix typo
async+perf: ch4, starting 'thunk' section
fix typo
async+perf: ch4, more text in 'thunks' section
async+perf: ch3, introducing 'promisory' terminology
async+perf: ch4, clarifying and finishing 'thunks' section
Merge pull request #228 from starandtina/patch-1

fix typo
core: tweaking title links in README
async+perf: cherry-picked fixes by @smikes, some cleanup of them, closes #229
async+perf: tweaking note in ch3, per #229
async+perf: starting on appendix-A, 'advanced async patterns'
fix typo
async+perf: moving appendix B to C
async+perf: lots more work on appendixA about 'asynquence'
Merge pull request #230 from chenxsan/fix-typo

fix typo
async+perf: apA, more on asynquence
async+perf: lots more in appendix-A
async+perf: finishing up appendix-A on 'asynquence'