Added tests for ternary operator [TDD]
Fix code for work with ternary tests #190
Fix php 5.3 build failed on []
LetStatement variable type added suport for add-assign, mul-assign, sub-assign

- added more test for arithmetic
Update docs about installation
Added checking of zephir installation
Fix installation for symlinked file
Merge pull request #191 from zaets28rus/bug-test-ternary

Bug test ternary
Merge pull request #193 from zaets28rus/let_statement_ulong-add-asign

LetStatement variable type added suport for add-assign, mul-assign, sub-...
Merge pull request #187 from hell0w0rd/update-readme-about-installation

Update docs about installation
Added tests for cast
Merge pull request #192 from hell0w0rd/tests-for-cast

Added tests for cast [TDD]
[NFR] Absolutes and relatives namespaces #178
Issue #178 c-code regenerated with php-gmp